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1640 lines
46 KiB
C
1640 lines
46 KiB
C
/*
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* OpenPIC emulation
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*
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* Copyright (c) 2004 Jocelyn Mayer
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* 2011 Alexander Graf
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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*
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* Based on OpenPic implementations:
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* - Motorola MPC8245 & MPC8540 user manuals.
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* - Motorola Harrier programmer manual
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*
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*/
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#include "qemu/osdep.h"
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#include "hw/irq.h"
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#include "hw/pci/pci.h"
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#include "hw/ppc/openpic.h"
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#include "hw/ppc/ppc_e500.h"
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#include "hw/qdev-properties.h"
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#include "hw/sysbus.h"
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#include "migration/vmstate.h"
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#include "hw/pci/msi.h"
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#include "qapi/error.h"
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#include "qemu/bitops.h"
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#include "qemu/module.h"
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#include "qemu/timer.h"
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#include "qemu/error-report.h"
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/* #define DEBUG_OPENPIC */
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#ifdef DEBUG_OPENPIC
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static const int debug_openpic = 1;
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#else
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static const int debug_openpic = 0;
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#endif
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static int get_current_cpu(void);
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#define DPRINTF(fmt, ...) do { \
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if (debug_openpic) { \
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info_report("Core%d: " fmt, get_current_cpu(), ## __VA_ARGS__); \
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} \
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} while (0)
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/* OpenPIC capability flags */
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#define OPENPIC_FLAG_IDR_CRIT (1 << 0)
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#define OPENPIC_FLAG_ILR (2 << 0)
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/* OpenPIC address map */
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#define OPENPIC_GLB_REG_START 0x0
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#define OPENPIC_GLB_REG_SIZE 0x10F0
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#define OPENPIC_TMR_REG_START 0x10F0
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#define OPENPIC_TMR_REG_SIZE 0x220
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#define OPENPIC_MSI_REG_START 0x1600
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#define OPENPIC_MSI_REG_SIZE 0x200
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#define OPENPIC_SUMMARY_REG_START 0x3800
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#define OPENPIC_SUMMARY_REG_SIZE 0x800
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#define OPENPIC_SRC_REG_START 0x10000
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#define OPENPIC_SRC_REG_SIZE (OPENPIC_MAX_SRC * 0x20)
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#define OPENPIC_CPU_REG_START 0x20000
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#define OPENPIC_CPU_REG_SIZE 0x100 + ((MAX_CPU - 1) * 0x1000)
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static FslMpicInfo fsl_mpic_20 = {
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.max_ext = 12,
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};
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static FslMpicInfo fsl_mpic_42 = {
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.max_ext = 12,
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};
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#define FRR_NIRQ_SHIFT 16
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#define FRR_NCPU_SHIFT 8
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#define FRR_VID_SHIFT 0
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#define VID_REVISION_1_2 2
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#define VID_REVISION_1_3 3
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#define VIR_GENERIC 0x00000000 /* Generic Vendor ID */
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#define VIR_MPIC2A 0x00004614 /* IBM MPIC-2A */
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#define GCR_RESET 0x80000000
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#define GCR_MODE_PASS 0x00000000
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#define GCR_MODE_MIXED 0x20000000
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#define GCR_MODE_PROXY 0x60000000
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#define TBCR_CI 0x80000000 /* count inhibit */
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#define TCCR_TOG 0x80000000 /* toggles when decrement to zero */
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#define IDR_EP_SHIFT 31
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#define IDR_EP_MASK (1U << IDR_EP_SHIFT)
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#define IDR_CI0_SHIFT 30
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#define IDR_CI1_SHIFT 29
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#define IDR_P1_SHIFT 1
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#define IDR_P0_SHIFT 0
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#define ILR_INTTGT_MASK 0x000000ff
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#define ILR_INTTGT_INT 0x00
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#define ILR_INTTGT_CINT 0x01 /* critical */
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#define ILR_INTTGT_MCP 0x02 /* machine check */
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/*
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* The currently supported INTTGT values happen to be the same as QEMU's
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* openpic output codes, but don't depend on this. The output codes
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* could change (unlikely, but...) or support could be added for
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* more INTTGT values.
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*/
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static const int inttgt_output[][2] = {
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{ ILR_INTTGT_INT, OPENPIC_OUTPUT_INT },
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{ ILR_INTTGT_CINT, OPENPIC_OUTPUT_CINT },
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{ ILR_INTTGT_MCP, OPENPIC_OUTPUT_MCK },
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};
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static int inttgt_to_output(int inttgt)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(inttgt_output); i++) {
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if (inttgt_output[i][0] == inttgt) {
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return inttgt_output[i][1];
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}
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}
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error_report("%s: unsupported inttgt %d", __func__, inttgt);
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return OPENPIC_OUTPUT_INT;
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}
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static int output_to_inttgt(int output)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(inttgt_output); i++) {
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if (inttgt_output[i][1] == output) {
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return inttgt_output[i][0];
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}
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}
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abort();
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}
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#define MSIIR_OFFSET 0x140
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#define MSIIR_SRS_SHIFT 29
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#define MSIIR_SRS_MASK (0x7 << MSIIR_SRS_SHIFT)
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#define MSIIR_IBS_SHIFT 24
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#define MSIIR_IBS_MASK (0x1f << MSIIR_IBS_SHIFT)
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static int get_current_cpu(void)
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{
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if (!current_cpu) {
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return -1;
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}
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return current_cpu->cpu_index;
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}
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static uint32_t openpic_cpu_read_internal(void *opaque, hwaddr addr,
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int idx);
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static void openpic_cpu_write_internal(void *opaque, hwaddr addr,
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uint32_t val, int idx);
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static void openpic_reset(DeviceState *d);
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/*
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* Convert between openpic clock ticks and nanosecs. In the hardware the clock
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* frequency is driven by board inputs to the PIC which the PIC would then
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* divide by 4 or 8. For now hard code to 25MZ.
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*/
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#define OPENPIC_TIMER_FREQ_MHZ 25
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#define OPENPIC_TIMER_NS_PER_TICK (1000 / OPENPIC_TIMER_FREQ_MHZ)
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static inline uint64_t ns_to_ticks(uint64_t ns)
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{
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return ns / OPENPIC_TIMER_NS_PER_TICK;
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}
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static inline uint64_t ticks_to_ns(uint64_t ticks)
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{
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return ticks * OPENPIC_TIMER_NS_PER_TICK;
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}
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static inline void IRQ_setbit(IRQQueue *q, int n_IRQ)
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{
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set_bit(n_IRQ, q->queue);
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}
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static inline void IRQ_resetbit(IRQQueue *q, int n_IRQ)
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{
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clear_bit(n_IRQ, q->queue);
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}
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static void IRQ_check(OpenPICState *opp, IRQQueue *q)
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{
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int irq = -1;
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int next = -1;
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int priority = -1;
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for (;;) {
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irq = find_next_bit(q->queue, opp->max_irq, irq + 1);
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if (irq == opp->max_irq) {
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break;
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}
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DPRINTF("IRQ_check: irq %d set ivpr_pr=%d pr=%d",
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irq, IVPR_PRIORITY(opp->src[irq].ivpr), priority);
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if (IVPR_PRIORITY(opp->src[irq].ivpr) > priority) {
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next = irq;
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priority = IVPR_PRIORITY(opp->src[irq].ivpr);
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}
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}
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q->next = next;
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q->priority = priority;
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}
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static int IRQ_get_next(OpenPICState *opp, IRQQueue *q)
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{
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/* XXX: optimize */
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IRQ_check(opp, q);
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return q->next;
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}
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static void IRQ_local_pipe(OpenPICState *opp, int n_CPU, int n_IRQ,
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bool active, bool was_active)
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{
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IRQDest *dst;
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IRQSource *src;
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int priority;
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dst = &opp->dst[n_CPU];
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src = &opp->src[n_IRQ];
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DPRINTF("%s: IRQ %d active %d was %d",
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__func__, n_IRQ, active, was_active);
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if (src->output != OPENPIC_OUTPUT_INT) {
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DPRINTF("%s: output %d irq %d active %d was %d count %d",
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__func__, src->output, n_IRQ, active, was_active,
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dst->outputs_active[src->output]);
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/*
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* On Freescale MPIC, critical interrupts ignore priority,
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* IACK, EOI, etc. Before MPIC v4.1 they also ignore
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* masking.
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*/
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if (active) {
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if (!was_active && dst->outputs_active[src->output]++ == 0) {
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DPRINTF("%s: Raise OpenPIC output %d cpu %d irq %d",
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__func__, src->output, n_CPU, n_IRQ);
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qemu_irq_raise(dst->irqs[src->output]);
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}
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} else {
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if (was_active && --dst->outputs_active[src->output] == 0) {
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DPRINTF("%s: Lower OpenPIC output %d cpu %d irq %d",
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__func__, src->output, n_CPU, n_IRQ);
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qemu_irq_lower(dst->irqs[src->output]);
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}
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}
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return;
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}
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priority = IVPR_PRIORITY(src->ivpr);
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/*
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* Even if the interrupt doesn't have enough priority,
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* it is still raised, in case ctpr is lowered later.
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*/
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if (active) {
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IRQ_setbit(&dst->raised, n_IRQ);
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} else {
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IRQ_resetbit(&dst->raised, n_IRQ);
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}
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IRQ_check(opp, &dst->raised);
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if (active && priority <= dst->ctpr) {
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DPRINTF("%s: IRQ %d priority %d too low for ctpr %d on CPU %d",
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__func__, n_IRQ, priority, dst->ctpr, n_CPU);
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active = 0;
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}
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if (active) {
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if (IRQ_get_next(opp, &dst->servicing) >= 0 &&
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priority <= dst->servicing.priority) {
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DPRINTF("%s: IRQ %d is hidden by servicing IRQ %d on CPU %d",
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__func__, n_IRQ, dst->servicing.next, n_CPU);
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} else {
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DPRINTF("%s: Raise OpenPIC INT output cpu %d irq %d/%d",
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__func__, n_CPU, n_IRQ, dst->raised.next);
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qemu_irq_raise(opp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]);
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}
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} else {
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IRQ_get_next(opp, &dst->servicing);
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if (dst->raised.priority > dst->ctpr &&
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dst->raised.priority > dst->servicing.priority) {
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DPRINTF("%s: IRQ %d inactive, IRQ %d prio %d above %d/%d, CPU %d",
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__func__, n_IRQ, dst->raised.next, dst->raised.priority,
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dst->ctpr, dst->servicing.priority, n_CPU);
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/* IRQ line stays asserted */
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} else {
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DPRINTF("%s: IRQ %d inactive, current prio %d/%d, CPU %d",
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__func__, n_IRQ, dst->ctpr, dst->servicing.priority, n_CPU);
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qemu_irq_lower(opp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]);
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}
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}
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}
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/* update pic state because registers for n_IRQ have changed value */
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static void openpic_update_irq(OpenPICState *opp, int n_IRQ)
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{
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IRQSource *src;
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bool active, was_active;
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int i;
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src = &opp->src[n_IRQ];
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active = src->pending;
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if ((src->ivpr & IVPR_MASK_MASK) && !src->nomask) {
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/* Interrupt source is disabled */
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DPRINTF("%s: IRQ %d is disabled", __func__, n_IRQ);
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active = false;
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}
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was_active = !!(src->ivpr & IVPR_ACTIVITY_MASK);
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/*
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* We don't have a similar check for already-active because
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* ctpr may have changed and we need to withdraw the interrupt.
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*/
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if (!active && !was_active) {
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DPRINTF("%s: IRQ %d is already inactive", __func__, n_IRQ);
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return;
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}
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if (active) {
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src->ivpr |= IVPR_ACTIVITY_MASK;
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} else {
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src->ivpr &= ~IVPR_ACTIVITY_MASK;
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}
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if (src->destmask == 0) {
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/* No target */
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DPRINTF("%s: IRQ %d has no target", __func__, n_IRQ);
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return;
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}
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if (src->destmask == (1 << src->last_cpu)) {
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/* Only one CPU is allowed to receive this IRQ */
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IRQ_local_pipe(opp, src->last_cpu, n_IRQ, active, was_active);
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} else if (!(src->ivpr & IVPR_MODE_MASK)) {
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/* Directed delivery mode */
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for (i = 0; i < opp->nb_cpus; i++) {
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if (src->destmask & (1 << i)) {
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IRQ_local_pipe(opp, i, n_IRQ, active, was_active);
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}
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}
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} else {
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/* Distributed delivery mode */
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for (i = src->last_cpu + 1; i != src->last_cpu; i++) {
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if (i == opp->nb_cpus) {
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i = 0;
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}
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if (src->destmask & (1 << i)) {
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IRQ_local_pipe(opp, i, n_IRQ, active, was_active);
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src->last_cpu = i;
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break;
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}
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}
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}
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}
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static void openpic_set_irq(void *opaque, int n_IRQ, int level)
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{
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OpenPICState *opp = opaque;
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IRQSource *src;
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if (n_IRQ >= OPENPIC_MAX_IRQ) {
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error_report("%s: IRQ %d out of range", __func__, n_IRQ);
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abort();
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}
|
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src = &opp->src[n_IRQ];
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DPRINTF("openpic: set irq %d = %d ivpr=0x%08x",
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n_IRQ, level, src->ivpr);
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if (src->level) {
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/* level-sensitive irq */
|
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src->pending = level;
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openpic_update_irq(opp, n_IRQ);
|
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} else {
|
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/* edge-sensitive irq */
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if (level) {
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src->pending = 1;
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openpic_update_irq(opp, n_IRQ);
|
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}
|
|
|
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if (src->output != OPENPIC_OUTPUT_INT) {
|
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/*
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* Edge-triggered interrupts shouldn't be used
|
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* with non-INT delivery, but just in case,
|
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* try to make it do something sane rather than
|
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* cause an interrupt storm. This is close to
|
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* what you'd probably see happen in real hardware.
|
|
*/
|
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src->pending = 0;
|
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openpic_update_irq(opp, n_IRQ);
|
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}
|
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}
|
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}
|
|
|
|
static inline uint32_t read_IRQreg_idr(OpenPICState *opp, int n_IRQ)
|
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{
|
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return opp->src[n_IRQ].idr;
|
|
}
|
|
|
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static inline uint32_t read_IRQreg_ilr(OpenPICState *opp, int n_IRQ)
|
|
{
|
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if (opp->flags & OPENPIC_FLAG_ILR) {
|
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return output_to_inttgt(opp->src[n_IRQ].output);
|
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}
|
|
|
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return 0xffffffff;
|
|
}
|
|
|
|
static inline uint32_t read_IRQreg_ivpr(OpenPICState *opp, int n_IRQ)
|
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{
|
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return opp->src[n_IRQ].ivpr;
|
|
}
|
|
|
|
static inline void write_IRQreg_idr(OpenPICState *opp, int n_IRQ, uint32_t val)
|
|
{
|
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IRQSource *src = &opp->src[n_IRQ];
|
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uint32_t normal_mask = (1UL << opp->nb_cpus) - 1;
|
|
uint32_t crit_mask = 0;
|
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uint32_t mask = normal_mask;
|
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int crit_shift = IDR_EP_SHIFT - opp->nb_cpus;
|
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int i;
|
|
|
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if (opp->flags & OPENPIC_FLAG_IDR_CRIT) {
|
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crit_mask = mask << crit_shift;
|
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mask |= crit_mask | IDR_EP;
|
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}
|
|
|
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src->idr = val & mask;
|
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DPRINTF("Set IDR %d to 0x%08x", n_IRQ, src->idr);
|
|
|
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if (opp->flags & OPENPIC_FLAG_IDR_CRIT) {
|
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if (src->idr & crit_mask) {
|
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if (src->idr & normal_mask) {
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DPRINTF("%s: IRQ configured for multiple output types, using "
|
|
"critical", __func__);
|
|
}
|
|
|
|
src->output = OPENPIC_OUTPUT_CINT;
|
|
src->nomask = true;
|
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src->destmask = 0;
|
|
|
|
for (i = 0; i < opp->nb_cpus; i++) {
|
|
int n_ci = IDR_CI0_SHIFT - i;
|
|
|
|
if (src->idr & (1UL << n_ci)) {
|
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src->destmask |= 1UL << i;
|
|
}
|
|
}
|
|
} else {
|
|
src->output = OPENPIC_OUTPUT_INT;
|
|
src->nomask = false;
|
|
src->destmask = src->idr & normal_mask;
|
|
}
|
|
} else {
|
|
src->destmask = src->idr;
|
|
}
|
|
}
|
|
|
|
static inline void write_IRQreg_ilr(OpenPICState *opp, int n_IRQ, uint32_t val)
|
|
{
|
|
if (opp->flags & OPENPIC_FLAG_ILR) {
|
|
IRQSource *src = &opp->src[n_IRQ];
|
|
|
|
src->output = inttgt_to_output(val & ILR_INTTGT_MASK);
|
|
DPRINTF("Set ILR %d to 0x%08x, output %d", n_IRQ, src->idr,
|
|
src->output);
|
|
|
|
/* TODO: on MPIC v4.0 only, set nomask for non-INT */
|
|
}
|
|
}
|
|
|
|
static inline void write_IRQreg_ivpr(OpenPICState *opp, int n_IRQ, uint32_t val)
|
|
{
|
|
uint32_t mask;
|
|
|
|
/*
|
|
* NOTE when implementing newer FSL MPIC models: starting with v4.0,
|
|
* the polarity bit is read-only on internal interrupts.
|
|
*/
|
|
mask = IVPR_MASK_MASK | IVPR_PRIORITY_MASK | IVPR_SENSE_MASK |
|
|
IVPR_POLARITY_MASK | opp->vector_mask;
|
|
|
|
/* ACTIVITY bit is read-only */
|
|
opp->src[n_IRQ].ivpr =
|
|
(opp->src[n_IRQ].ivpr & IVPR_ACTIVITY_MASK) | (val & mask);
|
|
|
|
/*
|
|
* For FSL internal interrupts, The sense bit is reserved and zero,
|
|
* and the interrupt is always level-triggered. Timers and IPIs
|
|
* have no sense or polarity bits, and are edge-triggered.
|
|
*/
|
|
switch (opp->src[n_IRQ].type) {
|
|
case IRQ_TYPE_NORMAL:
|
|
opp->src[n_IRQ].level = !!(opp->src[n_IRQ].ivpr & IVPR_SENSE_MASK);
|
|
break;
|
|
|
|
case IRQ_TYPE_FSLINT:
|
|
opp->src[n_IRQ].ivpr &= ~IVPR_SENSE_MASK;
|
|
break;
|
|
|
|
case IRQ_TYPE_FSLSPECIAL:
|
|
opp->src[n_IRQ].ivpr &= ~(IVPR_POLARITY_MASK | IVPR_SENSE_MASK);
|
|
break;
|
|
}
|
|
|
|
openpic_update_irq(opp, n_IRQ);
|
|
DPRINTF("Set IVPR %d to 0x%08x -> 0x%08x", n_IRQ, val,
|
|
opp->src[n_IRQ].ivpr);
|
|
}
|
|
|
|
static void openpic_gcr_write(OpenPICState *opp, uint64_t val)
|
|
{
|
|
bool mpic_proxy = false;
|
|
|
|
if (val & GCR_RESET) {
|
|
openpic_reset(DEVICE(opp));
|
|
return;
|
|
}
|
|
|
|
opp->gcr &= ~opp->mpic_mode_mask;
|
|
opp->gcr |= val & opp->mpic_mode_mask;
|
|
|
|
/* Set external proxy mode */
|
|
if ((val & opp->mpic_mode_mask) == GCR_MODE_PROXY) {
|
|
mpic_proxy = true;
|
|
}
|
|
|
|
ppce500_set_mpic_proxy(mpic_proxy);
|
|
}
|
|
|
|
static void openpic_gbl_write(void *opaque, hwaddr addr, uint64_t val,
|
|
unsigned len)
|
|
{
|
|
OpenPICState *opp = opaque;
|
|
IRQDest *dst;
|
|
int idx;
|
|
|
|
DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64,
|
|
__func__, addr, val);
|
|
if (addr & 0xF) {
|
|
return;
|
|
}
|
|
switch (addr) {
|
|
case 0x00: /* Block Revision Register1 (BRR1) is Readonly */
|
|
break;
|
|
case 0x40:
|
|
case 0x50:
|
|
case 0x60:
|
|
case 0x70:
|
|
case 0x80:
|
|
case 0x90:
|
|
case 0xA0:
|
|
case 0xB0:
|
|
openpic_cpu_write_internal(opp, addr, val, get_current_cpu());
|
|
break;
|
|
case 0x1000: /* FRR */
|
|
break;
|
|
case 0x1020: /* GCR */
|
|
openpic_gcr_write(opp, val);
|
|
break;
|
|
case 0x1080: /* VIR */
|
|
break;
|
|
case 0x1090: /* PIR */
|
|
for (idx = 0; idx < opp->nb_cpus; idx++) {
|
|
if ((val & (1 << idx)) && !(opp->pir & (1 << idx))) {
|
|
DPRINTF("Raise OpenPIC RESET output for CPU %d", idx);
|
|
dst = &opp->dst[idx];
|
|
qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_RESET]);
|
|
} else if (!(val & (1 << idx)) && (opp->pir & (1 << idx))) {
|
|
DPRINTF("Lower OpenPIC RESET output for CPU %d", idx);
|
|
dst = &opp->dst[idx];
|
|
qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_RESET]);
|
|
}
|
|
}
|
|
opp->pir = val;
|
|
break;
|
|
case 0x10A0: /* IPI_IVPR */
|
|
case 0x10B0:
|
|
case 0x10C0:
|
|
case 0x10D0:
|
|
idx = (addr - 0x10A0) >> 4;
|
|
write_IRQreg_ivpr(opp, opp->irq_ipi0 + idx, val);
|
|
break;
|
|
case 0x10E0: /* SPVE */
|
|
opp->spve = val & opp->vector_mask;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static uint64_t openpic_gbl_read(void *opaque, hwaddr addr, unsigned len)
|
|
{
|
|
OpenPICState *opp = opaque;
|
|
uint32_t retval;
|
|
|
|
DPRINTF("%s: addr %#" HWADDR_PRIx, __func__, addr);
|
|
retval = 0xFFFFFFFF;
|
|
if (addr & 0xF) {
|
|
return retval;
|
|
}
|
|
switch (addr) {
|
|
case 0x1000: /* FRR */
|
|
retval = opp->frr;
|
|
break;
|
|
case 0x1020: /* GCR */
|
|
retval = opp->gcr;
|
|
break;
|
|
case 0x1080: /* VIR */
|
|
retval = opp->vir;
|
|
break;
|
|
case 0x1090: /* PIR */
|
|
retval = 0x00000000;
|
|
break;
|
|
case 0x00: /* Block Revision Register1 (BRR1) */
|
|
retval = opp->brr1;
|
|
break;
|
|
case 0x40:
|
|
case 0x50:
|
|
case 0x60:
|
|
case 0x70:
|
|
case 0x80:
|
|
case 0x90:
|
|
case 0xA0:
|
|
case 0xB0:
|
|
retval = openpic_cpu_read_internal(opp, addr, get_current_cpu());
|
|
break;
|
|
case 0x10A0: /* IPI_IVPR */
|
|
case 0x10B0:
|
|
case 0x10C0:
|
|
case 0x10D0:
|
|
{
|
|
int idx;
|
|
idx = (addr - 0x10A0) >> 4;
|
|
retval = read_IRQreg_ivpr(opp, opp->irq_ipi0 + idx);
|
|
}
|
|
break;
|
|
case 0x10E0: /* SPVE */
|
|
retval = opp->spve;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
DPRINTF("%s: => 0x%08x", __func__, retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void openpic_tmr_set_tmr(OpenPICTimer *tmr, uint32_t val, bool enabled);
|
|
|
|
static void qemu_timer_cb(void *opaque)
|
|
{
|
|
OpenPICTimer *tmr = opaque;
|
|
OpenPICState *opp = tmr->opp;
|
|
uint32_t n_IRQ = tmr->n_IRQ;
|
|
uint32_t val = tmr->tbcr & ~TBCR_CI;
|
|
uint32_t tog = ((tmr->tccr & TCCR_TOG) ^ TCCR_TOG); /* invert toggle. */
|
|
|
|
DPRINTF("%s n_IRQ=%d", __func__, n_IRQ);
|
|
/* Reload current count from base count and setup timer. */
|
|
tmr->tccr = val | tog;
|
|
openpic_tmr_set_tmr(tmr, val, /*enabled=*/true);
|
|
/* Raise the interrupt. */
|
|
opp->src[n_IRQ].destmask = read_IRQreg_idr(opp, n_IRQ);
|
|
openpic_set_irq(opp, n_IRQ, 1);
|
|
openpic_set_irq(opp, n_IRQ, 0);
|
|
}
|
|
|
|
/*
|
|
* If enabled is true, arranges for an interrupt to be raised val clocks into
|
|
* the future, if enabled is false cancels the timer.
|
|
*/
|
|
static void openpic_tmr_set_tmr(OpenPICTimer *tmr, uint32_t val, bool enabled)
|
|
{
|
|
uint64_t ns = ticks_to_ns(val & ~TCCR_TOG);
|
|
/*
|
|
* A count of zero causes a timer to be set to expire immediately. This
|
|
* effectively stops the simulation since the timer is constantly expiring
|
|
* which prevents guest code execution, so we don't honor that
|
|
* configuration. On real hardware, this situation would generate an
|
|
* interrupt on every clock cycle if the interrupt was unmasked.
|
|
*/
|
|
if ((ns == 0) || !enabled) {
|
|
tmr->qemu_timer_active = false;
|
|
tmr->tccr = tmr->tccr & TCCR_TOG;
|
|
timer_del(tmr->qemu_timer); /* set timer to never expire. */
|
|
} else {
|
|
tmr->qemu_timer_active = true;
|
|
uint64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
|
tmr->origin_time = now;
|
|
timer_mod(tmr->qemu_timer, now + ns); /* set timer expiration. */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Returns the current tccr value, i.e., timer value (in clocks) with
|
|
* appropriate TOG.
|
|
*/
|
|
static uint64_t openpic_tmr_get_timer(OpenPICTimer *tmr)
|
|
{
|
|
uint64_t retval;
|
|
if (!tmr->qemu_timer_active) {
|
|
retval = tmr->tccr;
|
|
} else {
|
|
uint64_t now = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
|
uint64_t used = now - tmr->origin_time; /* nsecs */
|
|
uint32_t used_ticks = (uint32_t)ns_to_ticks(used);
|
|
uint32_t count = (tmr->tccr & ~TCCR_TOG) - used_ticks;
|
|
retval = (uint32_t)((tmr->tccr & TCCR_TOG) | (count & ~TCCR_TOG));
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static void openpic_tmr_write(void *opaque, hwaddr addr, uint64_t val,
|
|
unsigned len)
|
|
{
|
|
OpenPICState *opp = opaque;
|
|
int idx;
|
|
|
|
DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64,
|
|
__func__, (addr + 0x10f0), val);
|
|
if (addr & 0xF) {
|
|
return;
|
|
}
|
|
|
|
if (addr == 0) {
|
|
/* TFRR */
|
|
opp->tfrr = val;
|
|
return;
|
|
}
|
|
addr -= 0x10; /* correct for TFRR */
|
|
idx = (addr >> 6) & 0x3;
|
|
|
|
switch (addr & 0x30) {
|
|
case 0x00: /* TCCR */
|
|
break;
|
|
case 0x10: /* TBCR */
|
|
/* Did the enable status change? */
|
|
if ((opp->timers[idx].tbcr & TBCR_CI) != (val & TBCR_CI)) {
|
|
/* Did "Count Inhibit" transition from 1 to 0? */
|
|
if ((val & TBCR_CI) == 0) {
|
|
opp->timers[idx].tccr = val & ~TCCR_TOG;
|
|
}
|
|
openpic_tmr_set_tmr(&opp->timers[idx],
|
|
(val & ~TBCR_CI),
|
|
/*enabled=*/((val & TBCR_CI) == 0));
|
|
}
|
|
opp->timers[idx].tbcr = val;
|
|
break;
|
|
case 0x20: /* TVPR */
|
|
write_IRQreg_ivpr(opp, opp->irq_tim0 + idx, val);
|
|
break;
|
|
case 0x30: /* TDR */
|
|
write_IRQreg_idr(opp, opp->irq_tim0 + idx, val);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static uint64_t openpic_tmr_read(void *opaque, hwaddr addr, unsigned len)
|
|
{
|
|
OpenPICState *opp = opaque;
|
|
uint32_t retval = -1;
|
|
int idx;
|
|
|
|
DPRINTF("%s: addr %#" HWADDR_PRIx, __func__, addr + 0x10f0);
|
|
if (addr & 0xF) {
|
|
goto out;
|
|
}
|
|
if (addr == 0) {
|
|
/* TFRR */
|
|
retval = opp->tfrr;
|
|
goto out;
|
|
}
|
|
addr -= 0x10; /* correct for TFRR */
|
|
idx = (addr >> 6) & 0x3;
|
|
switch (addr & 0x30) {
|
|
case 0x00: /* TCCR */
|
|
retval = openpic_tmr_get_timer(&opp->timers[idx]);
|
|
break;
|
|
case 0x10: /* TBCR */
|
|
retval = opp->timers[idx].tbcr;
|
|
break;
|
|
case 0x20: /* TVPR */
|
|
retval = read_IRQreg_ivpr(opp, opp->irq_tim0 + idx);
|
|
break;
|
|
case 0x30: /* TDR */
|
|
retval = read_IRQreg_idr(opp, opp->irq_tim0 + idx);
|
|
break;
|
|
}
|
|
|
|
out:
|
|
DPRINTF("%s: => 0x%08x", __func__, retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void openpic_src_write(void *opaque, hwaddr addr, uint64_t val,
|
|
unsigned len)
|
|
{
|
|
OpenPICState *opp = opaque;
|
|
int idx;
|
|
|
|
DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64,
|
|
__func__, addr, val);
|
|
|
|
addr = addr & 0xffff;
|
|
idx = addr >> 5;
|
|
|
|
switch (addr & 0x1f) {
|
|
case 0x00:
|
|
write_IRQreg_ivpr(opp, idx, val);
|
|
break;
|
|
case 0x10:
|
|
write_IRQreg_idr(opp, idx, val);
|
|
break;
|
|
case 0x18:
|
|
write_IRQreg_ilr(opp, idx, val);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static uint64_t openpic_src_read(void *opaque, uint64_t addr, unsigned len)
|
|
{
|
|
OpenPICState *opp = opaque;
|
|
uint32_t retval;
|
|
int idx;
|
|
|
|
DPRINTF("%s: addr %#" HWADDR_PRIx, __func__, addr);
|
|
retval = 0xFFFFFFFF;
|
|
|
|
addr = addr & 0xffff;
|
|
idx = addr >> 5;
|
|
|
|
switch (addr & 0x1f) {
|
|
case 0x00:
|
|
retval = read_IRQreg_ivpr(opp, idx);
|
|
break;
|
|
case 0x10:
|
|
retval = read_IRQreg_idr(opp, idx);
|
|
break;
|
|
case 0x18:
|
|
retval = read_IRQreg_ilr(opp, idx);
|
|
break;
|
|
}
|
|
|
|
DPRINTF("%s: => 0x%08x", __func__, retval);
|
|
return retval;
|
|
}
|
|
|
|
static void openpic_msi_write(void *opaque, hwaddr addr, uint64_t val,
|
|
unsigned size)
|
|
{
|
|
OpenPICState *opp = opaque;
|
|
int idx = opp->irq_msi;
|
|
int srs, ibs;
|
|
|
|
DPRINTF("%s: addr %#" HWADDR_PRIx " <= 0x%08" PRIx64,
|
|
__func__, addr, val);
|
|
if (addr & 0xF) {
|
|
return;
|
|
}
|
|
|
|
switch (addr) {
|
|
case MSIIR_OFFSET:
|
|
srs = val >> MSIIR_SRS_SHIFT;
|
|
idx += srs;
|
|
ibs = (val & MSIIR_IBS_MASK) >> MSIIR_IBS_SHIFT;
|
|
opp->msi[srs].msir |= 1 << ibs;
|
|
openpic_set_irq(opp, idx, 1);
|
|
break;
|
|
default:
|
|
/* most registers are read-only, thus ignored */
|
|
break;
|
|
}
|
|
}
|
|
|
|
static uint64_t openpic_msi_read(void *opaque, hwaddr addr, unsigned size)
|
|
{
|
|
OpenPICState *opp = opaque;
|
|
uint64_t r = 0;
|
|
int i, srs;
|
|
|
|
DPRINTF("%s: addr %#" HWADDR_PRIx, __func__, addr);
|
|
if (addr & 0xF) {
|
|
return -1;
|
|
}
|
|
|
|
srs = addr >> 4;
|
|
|
|
switch (addr) {
|
|
case 0x00:
|
|
case 0x10:
|
|
case 0x20:
|
|
case 0x30:
|
|
case 0x40:
|
|
case 0x50:
|
|
case 0x60:
|
|
case 0x70: /* MSIRs */
|
|
r = opp->msi[srs].msir;
|
|
/* Clear on read */
|
|
opp->msi[srs].msir = 0;
|
|
openpic_set_irq(opp, opp->irq_msi + srs, 0);
|
|
break;
|
|
case 0x120: /* MSISR */
|
|
for (i = 0; i < MAX_MSI; i++) {
|
|
r |= (opp->msi[i].msir ? 1 : 0) << i;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static uint64_t openpic_summary_read(void *opaque, hwaddr addr, unsigned size)
|
|
{
|
|
uint64_t r = 0;
|
|
|
|
DPRINTF("%s: addr %#" HWADDR_PRIx, __func__, addr);
|
|
|
|
/* TODO: EISR/EIMR */
|
|
|
|
return r;
|
|
}
|
|
|
|
static void openpic_summary_write(void *opaque, hwaddr addr, uint64_t val,
|
|
unsigned size)
|
|
{
|
|
DPRINTF("%s: addr %#" HWADDR_PRIx " <= 0x%08" PRIx64,
|
|
__func__, addr, val);
|
|
|
|
/* TODO: EISR/EIMR */
|
|
}
|
|
|
|
static void openpic_cpu_write_internal(void *opaque, hwaddr addr,
|
|
uint32_t val, int idx)
|
|
{
|
|
OpenPICState *opp = opaque;
|
|
IRQSource *src;
|
|
IRQDest *dst;
|
|
int s_IRQ, n_IRQ;
|
|
|
|
DPRINTF("%s: cpu %d addr %#" HWADDR_PRIx " <= 0x%08x", __func__, idx,
|
|
addr, val);
|
|
|
|
if (idx < 0 || idx >= opp->nb_cpus) {
|
|
return;
|
|
}
|
|
|
|
if (addr & 0xF) {
|
|
return;
|
|
}
|
|
dst = &opp->dst[idx];
|
|
addr &= 0xFF0;
|
|
switch (addr) {
|
|
case 0x40: /* IPIDR */
|
|
case 0x50:
|
|
case 0x60:
|
|
case 0x70:
|
|
idx = (addr - 0x40) >> 4;
|
|
/* we use IDE as mask which CPUs to deliver the IPI to still. */
|
|
opp->src[opp->irq_ipi0 + idx].destmask |= val;
|
|
openpic_set_irq(opp, opp->irq_ipi0 + idx, 1);
|
|
openpic_set_irq(opp, opp->irq_ipi0 + idx, 0);
|
|
break;
|
|
case 0x80: /* CTPR */
|
|
dst->ctpr = val & 0x0000000F;
|
|
|
|
DPRINTF("%s: set CPU %d ctpr to %d, raised %d servicing %d",
|
|
__func__, idx, dst->ctpr, dst->raised.priority,
|
|
dst->servicing.priority);
|
|
|
|
if (dst->raised.priority <= dst->ctpr) {
|
|
DPRINTF("%s: Lower OpenPIC INT output cpu %d due to ctpr",
|
|
__func__, idx);
|
|
qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]);
|
|
} else if (dst->raised.priority > dst->servicing.priority) {
|
|
DPRINTF("%s: Raise OpenPIC INT output cpu %d irq %d",
|
|
__func__, idx, dst->raised.next);
|
|
qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_INT]);
|
|
}
|
|
|
|
break;
|
|
case 0x90: /* WHOAMI */
|
|
/* Read-only register */
|
|
break;
|
|
case 0xA0: /* IACK */
|
|
/* Read-only register */
|
|
break;
|
|
case 0xB0: /* EOI */
|
|
DPRINTF("EOI");
|
|
s_IRQ = IRQ_get_next(opp, &dst->servicing);
|
|
|
|
if (s_IRQ < 0) {
|
|
DPRINTF("%s: EOI with no interrupt in service", __func__);
|
|
break;
|
|
}
|
|
|
|
IRQ_resetbit(&dst->servicing, s_IRQ);
|
|
/* Set up next servicing IRQ */
|
|
s_IRQ = IRQ_get_next(opp, &dst->servicing);
|
|
/* Check queued interrupts. */
|
|
n_IRQ = IRQ_get_next(opp, &dst->raised);
|
|
if (n_IRQ != -1) {
|
|
src = &opp->src[n_IRQ];
|
|
if (s_IRQ == -1 ||
|
|
IVPR_PRIORITY(src->ivpr) > dst->servicing.priority) {
|
|
DPRINTF("Raise OpenPIC INT output cpu %d irq %d",
|
|
idx, n_IRQ);
|
|
qemu_irq_raise(opp->dst[idx].irqs[OPENPIC_OUTPUT_INT]);
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void openpic_cpu_write(void *opaque, hwaddr addr, uint64_t val,
|
|
unsigned len)
|
|
{
|
|
openpic_cpu_write_internal(opaque, addr, val, (addr & 0x1f000) >> 12);
|
|
}
|
|
|
|
|
|
static uint32_t openpic_iack(OpenPICState *opp, IRQDest *dst, int cpu)
|
|
{
|
|
IRQSource *src;
|
|
int retval, irq;
|
|
|
|
DPRINTF("Lower OpenPIC INT output");
|
|
qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]);
|
|
|
|
irq = IRQ_get_next(opp, &dst->raised);
|
|
DPRINTF("IACK: irq=%d", irq);
|
|
|
|
if (irq == -1) {
|
|
/* No more interrupt pending */
|
|
return opp->spve;
|
|
}
|
|
|
|
src = &opp->src[irq];
|
|
if (!(src->ivpr & IVPR_ACTIVITY_MASK) ||
|
|
!(IVPR_PRIORITY(src->ivpr) > dst->ctpr)) {
|
|
error_report("%s: bad raised IRQ %d ctpr %d ivpr 0x%08x",
|
|
__func__, irq, dst->ctpr, src->ivpr);
|
|
openpic_update_irq(opp, irq);
|
|
retval = opp->spve;
|
|
} else {
|
|
/* IRQ enter servicing state */
|
|
IRQ_setbit(&dst->servicing, irq);
|
|
retval = IVPR_VECTOR(opp, src->ivpr);
|
|
}
|
|
|
|
if (!src->level) {
|
|
/* edge-sensitive IRQ */
|
|
src->ivpr &= ~IVPR_ACTIVITY_MASK;
|
|
src->pending = 0;
|
|
IRQ_resetbit(&dst->raised, irq);
|
|
}
|
|
|
|
/* Timers and IPIs support multicast. */
|
|
if (((irq >= opp->irq_ipi0) && (irq < (opp->irq_ipi0 + OPENPIC_MAX_IPI))) ||
|
|
((irq >= opp->irq_tim0) && (irq < (opp->irq_tim0 + OPENPIC_MAX_TMR)))) {
|
|
DPRINTF("irq is IPI or TMR");
|
|
src->destmask &= ~(1 << cpu);
|
|
if (src->destmask && !src->level) {
|
|
/* trigger on CPUs that didn't know about it yet */
|
|
openpic_set_irq(opp, irq, 1);
|
|
openpic_set_irq(opp, irq, 0);
|
|
/* if all CPUs knew about it, set active bit again */
|
|
src->ivpr |= IVPR_ACTIVITY_MASK;
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
static uint32_t openpic_cpu_read_internal(void *opaque, hwaddr addr,
|
|
int idx)
|
|
{
|
|
OpenPICState *opp = opaque;
|
|
IRQDest *dst;
|
|
uint32_t retval;
|
|
|
|
DPRINTF("%s: cpu %d addr %#" HWADDR_PRIx, __func__, idx, addr);
|
|
retval = 0xFFFFFFFF;
|
|
|
|
if (idx < 0 || idx >= opp->nb_cpus) {
|
|
return retval;
|
|
}
|
|
|
|
if (addr & 0xF) {
|
|
return retval;
|
|
}
|
|
dst = &opp->dst[idx];
|
|
addr &= 0xFF0;
|
|
switch (addr) {
|
|
case 0x80: /* CTPR */
|
|
retval = dst->ctpr;
|
|
break;
|
|
case 0x90: /* WHOAMI */
|
|
retval = idx;
|
|
break;
|
|
case 0xA0: /* IACK */
|
|
retval = openpic_iack(opp, dst, idx);
|
|
break;
|
|
case 0xB0: /* EOI */
|
|
retval = 0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
DPRINTF("%s: => 0x%08x", __func__, retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static uint64_t openpic_cpu_read(void *opaque, hwaddr addr, unsigned len)
|
|
{
|
|
return openpic_cpu_read_internal(opaque, addr, (addr & 0x1f000) >> 12);
|
|
}
|
|
|
|
static const MemoryRegionOps openpic_glb_ops_le = {
|
|
.write = openpic_gbl_write,
|
|
.read = openpic_gbl_read,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static const MemoryRegionOps openpic_glb_ops_be = {
|
|
.write = openpic_gbl_write,
|
|
.read = openpic_gbl_read,
|
|
.endianness = DEVICE_BIG_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static const MemoryRegionOps openpic_tmr_ops_le = {
|
|
.write = openpic_tmr_write,
|
|
.read = openpic_tmr_read,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static const MemoryRegionOps openpic_tmr_ops_be = {
|
|
.write = openpic_tmr_write,
|
|
.read = openpic_tmr_read,
|
|
.endianness = DEVICE_BIG_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static const MemoryRegionOps openpic_cpu_ops_le = {
|
|
.write = openpic_cpu_write,
|
|
.read = openpic_cpu_read,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static const MemoryRegionOps openpic_cpu_ops_be = {
|
|
.write = openpic_cpu_write,
|
|
.read = openpic_cpu_read,
|
|
.endianness = DEVICE_BIG_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static const MemoryRegionOps openpic_src_ops_le = {
|
|
.write = openpic_src_write,
|
|
.read = openpic_src_read,
|
|
.endianness = DEVICE_LITTLE_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static const MemoryRegionOps openpic_src_ops_be = {
|
|
.write = openpic_src_write,
|
|
.read = openpic_src_read,
|
|
.endianness = DEVICE_BIG_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static const MemoryRegionOps openpic_msi_ops_be = {
|
|
.read = openpic_msi_read,
|
|
.write = openpic_msi_write,
|
|
.endianness = DEVICE_BIG_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static const MemoryRegionOps openpic_summary_ops_be = {
|
|
.read = openpic_summary_read,
|
|
.write = openpic_summary_write,
|
|
.endianness = DEVICE_BIG_ENDIAN,
|
|
.impl = {
|
|
.min_access_size = 4,
|
|
.max_access_size = 4,
|
|
},
|
|
};
|
|
|
|
static void openpic_reset(DeviceState *d)
|
|
{
|
|
OpenPICState *opp = OPENPIC(d);
|
|
int i;
|
|
|
|
opp->gcr = GCR_RESET;
|
|
/* Initialise controller registers */
|
|
opp->frr = ((opp->nb_irqs - 1) << FRR_NIRQ_SHIFT) |
|
|
((opp->nb_cpus - 1) << FRR_NCPU_SHIFT) |
|
|
(opp->vid << FRR_VID_SHIFT);
|
|
|
|
opp->pir = 0;
|
|
opp->spve = -1 & opp->vector_mask;
|
|
opp->tfrr = opp->tfrr_reset;
|
|
/* Initialise IRQ sources */
|
|
for (i = 0; i < opp->max_irq; i++) {
|
|
opp->src[i].ivpr = opp->ivpr_reset;
|
|
switch (opp->src[i].type) {
|
|
case IRQ_TYPE_NORMAL:
|
|
opp->src[i].level = !!(opp->ivpr_reset & IVPR_SENSE_MASK);
|
|
break;
|
|
|
|
case IRQ_TYPE_FSLINT:
|
|
opp->src[i].ivpr |= IVPR_POLARITY_MASK;
|
|
break;
|
|
|
|
case IRQ_TYPE_FSLSPECIAL:
|
|
break;
|
|
}
|
|
|
|
/* Mask all IPI interrupts for Freescale OpenPIC */
|
|
if ((opp->model == OPENPIC_MODEL_FSL_MPIC_20) ||
|
|
(opp->model == OPENPIC_MODEL_FSL_MPIC_42)) {
|
|
if (i >= opp->irq_ipi0 && i < opp->irq_tim0) {
|
|
write_IRQreg_idr(opp, i, 0);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
write_IRQreg_idr(opp, i, opp->idr_reset);
|
|
}
|
|
/* Initialise IRQ destinations */
|
|
for (i = 0; i < opp->nb_cpus; i++) {
|
|
opp->dst[i].ctpr = 15;
|
|
opp->dst[i].raised.next = -1;
|
|
opp->dst[i].raised.priority = 0;
|
|
bitmap_clear(opp->dst[i].raised.queue, 0, IRQQUEUE_SIZE_BITS);
|
|
opp->dst[i].servicing.next = -1;
|
|
opp->dst[i].servicing.priority = 0;
|
|
bitmap_clear(opp->dst[i].servicing.queue, 0, IRQQUEUE_SIZE_BITS);
|
|
}
|
|
/* Initialise timers */
|
|
for (i = 0; i < OPENPIC_MAX_TMR; i++) {
|
|
opp->timers[i].tccr = 0;
|
|
opp->timers[i].tbcr = TBCR_CI;
|
|
if (opp->timers[i].qemu_timer_active) {
|
|
timer_del(opp->timers[i].qemu_timer); /* Inhibit timer */
|
|
opp->timers[i].qemu_timer_active = false;
|
|
}
|
|
}
|
|
/* Go out of RESET state */
|
|
opp->gcr = 0;
|
|
}
|
|
|
|
typedef struct MemReg {
|
|
const char *name;
|
|
MemoryRegionOps const *ops;
|
|
hwaddr start_addr;
|
|
ram_addr_t size;
|
|
} MemReg;
|
|
|
|
static void fsl_common_init(OpenPICState *opp)
|
|
{
|
|
int i;
|
|
int virq = OPENPIC_MAX_SRC;
|
|
|
|
opp->vid = VID_REVISION_1_2;
|
|
opp->vir = VIR_GENERIC;
|
|
opp->vector_mask = 0xFFFF;
|
|
opp->tfrr_reset = 0;
|
|
opp->ivpr_reset = IVPR_MASK_MASK;
|
|
opp->idr_reset = 1 << 0;
|
|
opp->max_irq = OPENPIC_MAX_IRQ;
|
|
|
|
opp->irq_ipi0 = virq;
|
|
virq += OPENPIC_MAX_IPI;
|
|
opp->irq_tim0 = virq;
|
|
virq += OPENPIC_MAX_TMR;
|
|
|
|
assert(virq <= OPENPIC_MAX_IRQ);
|
|
|
|
opp->irq_msi = 224;
|
|
|
|
msi_nonbroken = true;
|
|
for (i = 0; i < opp->fsl->max_ext; i++) {
|
|
opp->src[i].level = false;
|
|
}
|
|
|
|
/* Internal interrupts, including message and MSI */
|
|
for (i = 16; i < OPENPIC_MAX_SRC; i++) {
|
|
opp->src[i].type = IRQ_TYPE_FSLINT;
|
|
opp->src[i].level = true;
|
|
}
|
|
|
|
/* timers and IPIs */
|
|
for (i = OPENPIC_MAX_SRC; i < virq; i++) {
|
|
opp->src[i].type = IRQ_TYPE_FSLSPECIAL;
|
|
opp->src[i].level = false;
|
|
}
|
|
|
|
for (i = 0; i < OPENPIC_MAX_TMR; i++) {
|
|
opp->timers[i].n_IRQ = opp->irq_tim0 + i;
|
|
opp->timers[i].qemu_timer_active = false;
|
|
opp->timers[i].qemu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
|
|
&qemu_timer_cb,
|
|
&opp->timers[i]);
|
|
opp->timers[i].opp = opp;
|
|
}
|
|
}
|
|
|
|
static void map_list(OpenPICState *opp, const MemReg *list, int *count)
|
|
{
|
|
while (list->name) {
|
|
assert(*count < ARRAY_SIZE(opp->sub_io_mem));
|
|
|
|
memory_region_init_io(&opp->sub_io_mem[*count], OBJECT(opp), list->ops,
|
|
opp, list->name, list->size);
|
|
|
|
memory_region_add_subregion(&opp->mem, list->start_addr,
|
|
&opp->sub_io_mem[*count]);
|
|
|
|
(*count)++;
|
|
list++;
|
|
}
|
|
}
|
|
|
|
static const VMStateDescription vmstate_openpic_irq_queue = {
|
|
.name = "openpic_irq_queue",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_BITMAP(queue, IRQQueue, 0, queue_size),
|
|
VMSTATE_INT32(next, IRQQueue),
|
|
VMSTATE_INT32(priority, IRQQueue),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static const VMStateDescription vmstate_openpic_irqdest = {
|
|
.name = "openpic_irqdest",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_INT32(ctpr, IRQDest),
|
|
VMSTATE_STRUCT(raised, IRQDest, 0, vmstate_openpic_irq_queue,
|
|
IRQQueue),
|
|
VMSTATE_STRUCT(servicing, IRQDest, 0, vmstate_openpic_irq_queue,
|
|
IRQQueue),
|
|
VMSTATE_UINT32_ARRAY(outputs_active, IRQDest, OPENPIC_OUTPUT_NB),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static const VMStateDescription vmstate_openpic_irqsource = {
|
|
.name = "openpic_irqsource",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_UINT32(ivpr, IRQSource),
|
|
VMSTATE_UINT32(idr, IRQSource),
|
|
VMSTATE_UINT32(destmask, IRQSource),
|
|
VMSTATE_INT32(last_cpu, IRQSource),
|
|
VMSTATE_INT32(pending, IRQSource),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static const VMStateDescription vmstate_openpic_timer = {
|
|
.name = "openpic_timer",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_UINT32(tccr, OpenPICTimer),
|
|
VMSTATE_UINT32(tbcr, OpenPICTimer),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static const VMStateDescription vmstate_openpic_msi = {
|
|
.name = "openpic_msi",
|
|
.version_id = 0,
|
|
.minimum_version_id = 0,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_UINT32(msir, OpenPICMSI),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static int openpic_post_load(void *opaque, int version_id)
|
|
{
|
|
OpenPICState *opp = (OpenPICState *)opaque;
|
|
int i;
|
|
|
|
/* Update internal ivpr and idr variables */
|
|
for (i = 0; i < opp->max_irq; i++) {
|
|
write_IRQreg_idr(opp, i, opp->src[i].idr);
|
|
write_IRQreg_ivpr(opp, i, opp->src[i].ivpr);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const VMStateDescription vmstate_openpic = {
|
|
.name = "openpic",
|
|
.version_id = 3,
|
|
.minimum_version_id = 3,
|
|
.post_load = openpic_post_load,
|
|
.fields = (const VMStateField[]) {
|
|
VMSTATE_UINT32(gcr, OpenPICState),
|
|
VMSTATE_UINT32(vir, OpenPICState),
|
|
VMSTATE_UINT32(pir, OpenPICState),
|
|
VMSTATE_UINT32(spve, OpenPICState),
|
|
VMSTATE_UINT32(tfrr, OpenPICState),
|
|
VMSTATE_UINT32(max_irq, OpenPICState),
|
|
VMSTATE_STRUCT_VARRAY_UINT32(src, OpenPICState, max_irq, 0,
|
|
vmstate_openpic_irqsource, IRQSource),
|
|
VMSTATE_UINT32_EQUAL(nb_cpus, OpenPICState, NULL),
|
|
VMSTATE_STRUCT_VARRAY_UINT32(dst, OpenPICState, nb_cpus, 0,
|
|
vmstate_openpic_irqdest, IRQDest),
|
|
VMSTATE_STRUCT_ARRAY(timers, OpenPICState, OPENPIC_MAX_TMR, 0,
|
|
vmstate_openpic_timer, OpenPICTimer),
|
|
VMSTATE_STRUCT_ARRAY(msi, OpenPICState, MAX_MSI, 0,
|
|
vmstate_openpic_msi, OpenPICMSI),
|
|
VMSTATE_UINT32(irq_ipi0, OpenPICState),
|
|
VMSTATE_UINT32(irq_tim0, OpenPICState),
|
|
VMSTATE_UINT32(irq_msi, OpenPICState),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static void openpic_init(Object *obj)
|
|
{
|
|
OpenPICState *opp = OPENPIC(obj);
|
|
|
|
memory_region_init(&opp->mem, obj, "openpic", 0x40000);
|
|
}
|
|
|
|
static void openpic_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
SysBusDevice *d = SYS_BUS_DEVICE(dev);
|
|
OpenPICState *opp = OPENPIC(dev);
|
|
int i, j;
|
|
int list_count = 0;
|
|
static const MemReg list_le[] = {
|
|
{"glb", &openpic_glb_ops_le,
|
|
OPENPIC_GLB_REG_START, OPENPIC_GLB_REG_SIZE},
|
|
{"tmr", &openpic_tmr_ops_le,
|
|
OPENPIC_TMR_REG_START, OPENPIC_TMR_REG_SIZE},
|
|
{"src", &openpic_src_ops_le,
|
|
OPENPIC_SRC_REG_START, OPENPIC_SRC_REG_SIZE},
|
|
{"cpu", &openpic_cpu_ops_le,
|
|
OPENPIC_CPU_REG_START, OPENPIC_CPU_REG_SIZE},
|
|
{NULL}
|
|
};
|
|
static const MemReg list_be[] = {
|
|
{"glb", &openpic_glb_ops_be,
|
|
OPENPIC_GLB_REG_START, OPENPIC_GLB_REG_SIZE},
|
|
{"tmr", &openpic_tmr_ops_be,
|
|
OPENPIC_TMR_REG_START, OPENPIC_TMR_REG_SIZE},
|
|
{"src", &openpic_src_ops_be,
|
|
OPENPIC_SRC_REG_START, OPENPIC_SRC_REG_SIZE},
|
|
{"cpu", &openpic_cpu_ops_be,
|
|
OPENPIC_CPU_REG_START, OPENPIC_CPU_REG_SIZE},
|
|
{NULL}
|
|
};
|
|
static const MemReg list_fsl[] = {
|
|
{"msi", &openpic_msi_ops_be,
|
|
OPENPIC_MSI_REG_START, OPENPIC_MSI_REG_SIZE},
|
|
{"summary", &openpic_summary_ops_be,
|
|
OPENPIC_SUMMARY_REG_START, OPENPIC_SUMMARY_REG_SIZE},
|
|
{NULL}
|
|
};
|
|
|
|
if (opp->nb_cpus > MAX_CPU) {
|
|
error_setg(errp, "property 'nb_cpus' can be at most %d", MAX_CPU);
|
|
return;
|
|
}
|
|
|
|
switch (opp->model) {
|
|
case OPENPIC_MODEL_FSL_MPIC_20:
|
|
default:
|
|
opp->fsl = &fsl_mpic_20;
|
|
opp->brr1 = 0x00400200;
|
|
opp->flags |= OPENPIC_FLAG_IDR_CRIT;
|
|
opp->nb_irqs = 80;
|
|
opp->mpic_mode_mask = GCR_MODE_MIXED;
|
|
|
|
fsl_common_init(opp);
|
|
map_list(opp, list_be, &list_count);
|
|
map_list(opp, list_fsl, &list_count);
|
|
|
|
break;
|
|
|
|
case OPENPIC_MODEL_FSL_MPIC_42:
|
|
opp->fsl = &fsl_mpic_42;
|
|
opp->brr1 = 0x00400402;
|
|
opp->flags |= OPENPIC_FLAG_ILR;
|
|
opp->nb_irqs = 196;
|
|
opp->mpic_mode_mask = GCR_MODE_PROXY;
|
|
|
|
fsl_common_init(opp);
|
|
map_list(opp, list_be, &list_count);
|
|
map_list(opp, list_fsl, &list_count);
|
|
|
|
break;
|
|
|
|
case OPENPIC_MODEL_KEYLARGO:
|
|
opp->nb_irqs = KEYLARGO_MAX_EXT;
|
|
opp->vid = VID_REVISION_1_2;
|
|
opp->vir = VIR_GENERIC;
|
|
opp->vector_mask = 0xFF;
|
|
opp->tfrr_reset = 4160000;
|
|
opp->ivpr_reset = IVPR_MASK_MASK | IVPR_MODE_MASK;
|
|
opp->idr_reset = 0;
|
|
opp->max_irq = KEYLARGO_MAX_IRQ;
|
|
opp->irq_ipi0 = KEYLARGO_IPI_IRQ;
|
|
opp->irq_tim0 = KEYLARGO_TMR_IRQ;
|
|
opp->brr1 = -1;
|
|
opp->mpic_mode_mask = GCR_MODE_MIXED;
|
|
|
|
if (opp->nb_cpus != 1) {
|
|
error_setg(errp, "Only UP supported today");
|
|
return;
|
|
}
|
|
|
|
map_list(opp, list_le, &list_count);
|
|
break;
|
|
}
|
|
|
|
for (i = 0; i < opp->nb_cpus; i++) {
|
|
opp->dst[i].irqs = g_new0(qemu_irq, OPENPIC_OUTPUT_NB);
|
|
for (j = 0; j < OPENPIC_OUTPUT_NB; j++) {
|
|
sysbus_init_irq(d, &opp->dst[i].irqs[j]);
|
|
}
|
|
|
|
opp->dst[i].raised.queue_size = IRQQUEUE_SIZE_BITS;
|
|
opp->dst[i].raised.queue = bitmap_new(IRQQUEUE_SIZE_BITS);
|
|
opp->dst[i].servicing.queue_size = IRQQUEUE_SIZE_BITS;
|
|
opp->dst[i].servicing.queue = bitmap_new(IRQQUEUE_SIZE_BITS);
|
|
}
|
|
|
|
sysbus_init_mmio(d, &opp->mem);
|
|
qdev_init_gpio_in(dev, openpic_set_irq, opp->max_irq);
|
|
}
|
|
|
|
static Property openpic_properties[] = {
|
|
DEFINE_PROP_UINT32("model", OpenPICState, model, OPENPIC_MODEL_FSL_MPIC_20),
|
|
DEFINE_PROP_UINT32("nb_cpus", OpenPICState, nb_cpus, 1),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void openpic_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(oc);
|
|
|
|
dc->realize = openpic_realize;
|
|
device_class_set_props(dc, openpic_properties);
|
|
device_class_set_legacy_reset(dc, openpic_reset);
|
|
dc->vmsd = &vmstate_openpic;
|
|
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
|
|
}
|
|
|
|
static const TypeInfo openpic_info = {
|
|
.name = TYPE_OPENPIC,
|
|
.parent = TYPE_SYS_BUS_DEVICE,
|
|
.instance_size = sizeof(OpenPICState),
|
|
.instance_init = openpic_init,
|
|
.class_init = openpic_class_init,
|
|
};
|
|
|
|
static void openpic_register_types(void)
|
|
{
|
|
type_register_static(&openpic_info);
|
|
}
|
|
|
|
type_init(openpic_register_types)
|