root / hw / alpha_typhoon.c @ 0d09e41a
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| 1 |
/*
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* DEC 21272 (TSUNAMI/TYPHOON) chipset emulation.
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*
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* Written by Richard Henderson.
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*
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* This work is licensed under the GNU GPL license version 2 or later.
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*/
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#include "cpu.h" |
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#include "exec/exec-all.h" |
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#include "hw/hw.h" |
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#include "hw/arm/devices.h" |
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#include "sysemu/sysemu.h" |
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#include "hw/alpha_sys.h" |
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#include "exec/address-spaces.h" |
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#define TYPE_TYPHOON_PCI_HOST_BRIDGE "typhoon-pcihost" |
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typedef struct TyphoonCchip { |
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MemoryRegion region; |
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uint64_t misc; |
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uint64_t drir; |
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uint64_t dim[4];
|
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uint32_t iic[4];
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AlphaCPU *cpu[4];
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} TyphoonCchip; |
| 28 |
|
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typedef struct TyphoonWindow { |
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uint32_t base_addr; |
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uint32_t mask; |
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uint32_t translated_base_pfn; |
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} TyphoonWindow; |
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|
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typedef struct TyphoonPchip { |
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MemoryRegion region; |
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MemoryRegion reg_iack; |
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MemoryRegion reg_mem; |
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MemoryRegion reg_io; |
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MemoryRegion reg_conf; |
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uint64_t ctl; |
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TyphoonWindow win[4];
|
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} TyphoonPchip; |
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|
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#define TYPHOON_PCI_HOST_BRIDGE(obj) \
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OBJECT_CHECK(TyphoonState, (obj), TYPE_TYPHOON_PCI_HOST_BRIDGE) |
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|
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typedef struct TyphoonState { |
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PCIHostState parent_obj; |
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|
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TyphoonCchip cchip; |
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TyphoonPchip pchip; |
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MemoryRegion dchip_region; |
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MemoryRegion ram_region; |
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|
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/* QEMU emulation state. */
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uint32_t latch_tmp; |
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} TyphoonState; |
| 59 |
|
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/* Called when one of DRIR or DIM changes. */
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static void cpu_irq_change(AlphaCPU *cpu, uint64_t req) |
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{
|
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/* If there are any non-masked interrupts, tell the cpu. */
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if (cpu != NULL) { |
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CPUState *cs = CPU(cpu); |
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if (req) {
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cpu_interrupt(cs, CPU_INTERRUPT_HARD); |
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} else {
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cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); |
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} |
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} |
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} |
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|
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static uint64_t cchip_read(void *opaque, hwaddr addr, unsigned size) |
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{
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CPUAlphaState *env = cpu_single_env; |
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TyphoonState *s = opaque; |
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CPUState *cpu; |
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uint64_t ret = 0;
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|
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if (addr & 4) { |
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return s->latch_tmp;
|
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} |
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|
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switch (addr) {
|
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case 0x0000: |
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/* CSC: Cchip System Configuration Register. */
|
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/* All sorts of data here; probably the only thing relevant is
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PIP<14> Pchip 1 Present = 0. */
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break;
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|
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case 0x0040: |
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/* MTR: Memory Timing Register. */
|
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/* All sorts of stuff related to real DRAM. */
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break;
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|
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case 0x0080: |
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/* MISC: Miscellaneous Register. */
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cpu = ENV_GET_CPU(env); |
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ret = s->cchip.misc | (cpu->cpu_index & 3);
|
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break;
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|
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case 0x00c0: |
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/* MPD: Memory Presence Detect Register. */
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break;
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|
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case 0x0100: /* AAR0 */ |
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case 0x0140: /* AAR1 */ |
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case 0x0180: /* AAR2 */ |
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case 0x01c0: /* AAR3 */ |
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/* AAR: Array Address Register. */
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/* All sorts of information about DRAM. */
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break;
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|
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case 0x0200: |
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/* DIM0: Device Interrupt Mask Register, CPU0. */
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ret = s->cchip.dim[0];
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break;
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case 0x0240: |
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/* DIM1: Device Interrupt Mask Register, CPU1. */
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ret = s->cchip.dim[1];
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break;
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case 0x0280: |
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/* DIR0: Device Interrupt Request Register, CPU0. */
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ret = s->cchip.dim[0] & s->cchip.drir;
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break;
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case 0x02c0: |
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/* DIR1: Device Interrupt Request Register, CPU1. */
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ret = s->cchip.dim[1] & s->cchip.drir;
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break;
|
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case 0x0300: |
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/* DRIR: Device Raw Interrupt Request Register. */
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ret = s->cchip.drir; |
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break;
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|
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case 0x0340: |
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/* PRBEN: Probe Enable Register. */
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break;
|
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|
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case 0x0380: |
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/* IIC0: Interval Ignore Count Register, CPU0. */
|
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ret = s->cchip.iic[0];
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break;
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case 0x03c0: |
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/* IIC1: Interval Ignore Count Register, CPU1. */
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ret = s->cchip.iic[1];
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break;
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|
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case 0x0400: /* MPR0 */ |
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case 0x0440: /* MPR1 */ |
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case 0x0480: /* MPR2 */ |
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case 0x04c0: /* MPR3 */ |
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/* MPR: Memory Programming Register. */
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break;
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|
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case 0x0580: |
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/* TTR: TIGbus Timing Register. */
|
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/* All sorts of stuff related to interrupt delivery timings. */
|
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break;
|
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case 0x05c0: |
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/* TDR: TIGbug Device Timing Register. */
|
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break;
|
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|
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case 0x0600: |
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/* DIM2: Device Interrupt Mask Register, CPU2. */
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ret = s->cchip.dim[2];
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break;
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case 0x0640: |
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/* DIM3: Device Interrupt Mask Register, CPU3. */
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ret = s->cchip.dim[3];
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break;
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case 0x0680: |
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/* DIR2: Device Interrupt Request Register, CPU2. */
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ret = s->cchip.dim[2] & s->cchip.drir;
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break;
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case 0x06c0: |
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/* DIR3: Device Interrupt Request Register, CPU3. */
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ret = s->cchip.dim[3] & s->cchip.drir;
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break;
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|
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case 0x0700: |
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/* IIC2: Interval Ignore Count Register, CPU2. */
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ret = s->cchip.iic[2];
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break;
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case 0x0740: |
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/* IIC3: Interval Ignore Count Register, CPU3. */
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ret = s->cchip.iic[3];
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break;
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|
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case 0x0780: |
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/* PWR: Power Management Control. */
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break;
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|
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case 0x0c00: /* CMONCTLA */ |
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case 0x0c40: /* CMONCTLB */ |
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case 0x0c80: /* CMONCNT01 */ |
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case 0x0cc0: /* CMONCNT23 */ |
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break;
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|
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default:
|
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cpu_unassigned_access(cpu_single_env, addr, 0, 0, 0, size); |
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return -1; |
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} |
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|
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s->latch_tmp = ret >> 32;
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return ret;
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} |
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|
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static uint64_t dchip_read(void *opaque, hwaddr addr, unsigned size) |
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{
|
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/* Skip this. It's all related to DRAM timing and setup. */
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return 0; |
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} |
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|
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static uint64_t pchip_read(void *opaque, hwaddr addr, unsigned size) |
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{
|
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TyphoonState *s = opaque; |
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uint64_t ret = 0;
|
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|
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if (addr & 4) { |
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return s->latch_tmp;
|
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} |
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|
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switch (addr) {
|
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case 0x0000: |
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/* WSBA0: Window Space Base Address Register. */
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ret = s->pchip.win[0].base_addr;
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break;
|
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case 0x0040: |
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/* WSBA1 */
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ret = s->pchip.win[1].base_addr;
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break;
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case 0x0080: |
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/* WSBA2 */
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ret = s->pchip.win[2].base_addr;
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break;
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case 0x00c0: |
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/* WSBA3 */
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ret = s->pchip.win[3].base_addr;
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break;
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|
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case 0x0100: |
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/* WSM0: Window Space Mask Register. */
|
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ret = s->pchip.win[0].mask;
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break;
|
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case 0x0140: |
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/* WSM1 */
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ret = s->pchip.win[1].mask;
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break;
|
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case 0x0180: |
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/* WSM2 */
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ret = s->pchip.win[2].mask;
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break;
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case 0x01c0: |
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/* WSM3 */
|
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ret = s->pchip.win[3].mask;
|
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break;
|
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|
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case 0x0200: |
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/* TBA0: Translated Base Address Register. */
|
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ret = (uint64_t)s->pchip.win[0].translated_base_pfn << 10; |
| 262 |
break;
|
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case 0x0240: |
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/* TBA1 */
|
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ret = (uint64_t)s->pchip.win[1].translated_base_pfn << 10; |
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break;
|
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case 0x0280: |
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/* TBA2 */
|
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ret = (uint64_t)s->pchip.win[2].translated_base_pfn << 10; |
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break;
|
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case 0x02c0: |
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/* TBA3 */
|
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ret = (uint64_t)s->pchip.win[3].translated_base_pfn << 10; |
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break;
|
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|
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case 0x0300: |
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/* PCTL: Pchip Control Register. */
|
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ret = s->pchip.ctl; |
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break;
|
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case 0x0340: |
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/* PLAT: Pchip Master Latency Register. */
|
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break;
|
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case 0x03c0: |
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/* PERROR: Pchip Error Register. */
|
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break;
|
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case 0x0400: |
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/* PERRMASK: Pchip Error Mask Register. */
|
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break;
|
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case 0x0440: |
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/* PERRSET: Pchip Error Set Register. */
|
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break;
|
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case 0x0480: |
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/* TLBIV: Translation Buffer Invalidate Virtual Register (WO). */
|
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break;
|
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case 0x04c0: |
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/* TLBIA: Translation Buffer Invalidate All Register (WO). */
|
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break;
|
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case 0x0500: /* PMONCTL */ |
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case 0x0540: /* PMONCNT */ |
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case 0x0800: /* SPRST */ |
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break;
|
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|
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default:
|
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cpu_unassigned_access(cpu_single_env, addr, 0, 0, 0, size); |
| 305 |
return -1; |
| 306 |
} |
| 307 |
|
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s->latch_tmp = ret >> 32;
|
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return ret;
|
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} |
| 311 |
|
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static void cchip_write(void *opaque, hwaddr addr, |
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uint64_t v32, unsigned size)
|
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{
|
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TyphoonState *s = opaque; |
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uint64_t val, oldval, newval; |
| 317 |
|
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if (addr & 4) { |
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val = v32 << 32 | s->latch_tmp;
|
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addr ^= 4;
|
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} else {
|
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s->latch_tmp = v32; |
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return;
|
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} |
| 325 |
|
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switch (addr) {
|
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case 0x0000: |
| 328 |
/* CSC: Cchip System Configuration Register. */
|
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/* All sorts of data here; nothing relevant RW. */
|
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break;
|
| 331 |
|
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case 0x0040: |
| 333 |
/* MTR: Memory Timing Register. */
|
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/* All sorts of stuff related to real DRAM. */
|
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break;
|
| 336 |
|
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case 0x0080: |
| 338 |
/* MISC: Miscellaneous Register. */
|
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newval = oldval = s->cchip.misc; |
| 340 |
newval &= ~(val & 0x10000ff0); /* W1C fields */ |
| 341 |
if (val & 0x100000) { |
| 342 |
newval &= ~0xff0000ull; /* ACL clears ABT and ABW */ |
| 343 |
} else {
|
| 344 |
newval |= val & 0x00f00000; /* ABT field is W1S */ |
| 345 |
if ((newval & 0xf0000) == 0) { |
| 346 |
newval |= val & 0xf0000; /* ABW field is W1S iff zero */ |
| 347 |
} |
| 348 |
} |
| 349 |
newval |= (val & 0xf000) >> 4; /* IPREQ field sets IPINTR. */ |
| 350 |
|
| 351 |
newval &= ~0xf0000000000ull; /* WO and RW fields */ |
| 352 |
newval |= val & 0xf0000000000ull;
|
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s->cchip.misc = newval; |
| 354 |
|
| 355 |
/* Pass on changes to IPI and ITI state. */
|
| 356 |
if ((newval ^ oldval) & 0xff0) { |
| 357 |
int i;
|
| 358 |
for (i = 0; i < 4; ++i) { |
| 359 |
AlphaCPU *cpu = s->cchip.cpu[i]; |
| 360 |
if (cpu != NULL) { |
| 361 |
CPUState *cs = CPU(cpu); |
| 362 |
/* IPI can be either cleared or set by the write. */
|
| 363 |
if (newval & (1 << (i + 8))) { |
| 364 |
cpu_interrupt(cs, CPU_INTERRUPT_SMP); |
| 365 |
} else {
|
| 366 |
cpu_reset_interrupt(cs, CPU_INTERRUPT_SMP); |
| 367 |
} |
| 368 |
|
| 369 |
/* ITI can only be cleared by the write. */
|
| 370 |
if ((newval & (1 << (i + 4))) == 0) { |
| 371 |
cpu_reset_interrupt(cs, CPU_INTERRUPT_TIMER); |
| 372 |
} |
| 373 |
} |
| 374 |
} |
| 375 |
} |
| 376 |
break;
|
| 377 |
|
| 378 |
case 0x00c0: |
| 379 |
/* MPD: Memory Presence Detect Register. */
|
| 380 |
break;
|
| 381 |
|
| 382 |
case 0x0100: /* AAR0 */ |
| 383 |
case 0x0140: /* AAR1 */ |
| 384 |
case 0x0180: /* AAR2 */ |
| 385 |
case 0x01c0: /* AAR3 */ |
| 386 |
/* AAR: Array Address Register. */
|
| 387 |
/* All sorts of information about DRAM. */
|
| 388 |
break;
|
| 389 |
|
| 390 |
case 0x0200: /* DIM0 */ |
| 391 |
/* DIM: Device Interrupt Mask Register, CPU0. */
|
| 392 |
s->cchip.dim[0] = val;
|
| 393 |
cpu_irq_change(s->cchip.cpu[0], val & s->cchip.drir);
|
| 394 |
break;
|
| 395 |
case 0x0240: /* DIM1 */ |
| 396 |
/* DIM: Device Interrupt Mask Register, CPU1. */
|
| 397 |
s->cchip.dim[0] = val;
|
| 398 |
cpu_irq_change(s->cchip.cpu[1], val & s->cchip.drir);
|
| 399 |
break;
|
| 400 |
|
| 401 |
case 0x0280: /* DIR0 (RO) */ |
| 402 |
case 0x02c0: /* DIR1 (RO) */ |
| 403 |
case 0x0300: /* DRIR (RO) */ |
| 404 |
break;
|
| 405 |
|
| 406 |
case 0x0340: |
| 407 |
/* PRBEN: Probe Enable Register. */
|
| 408 |
break;
|
| 409 |
|
| 410 |
case 0x0380: /* IIC0 */ |
| 411 |
s->cchip.iic[0] = val & 0xffffff; |
| 412 |
break;
|
| 413 |
case 0x03c0: /* IIC1 */ |
| 414 |
s->cchip.iic[1] = val & 0xffffff; |
| 415 |
break;
|
| 416 |
|
| 417 |
case 0x0400: /* MPR0 */ |
| 418 |
case 0x0440: /* MPR1 */ |
| 419 |
case 0x0480: /* MPR2 */ |
| 420 |
case 0x04c0: /* MPR3 */ |
| 421 |
/* MPR: Memory Programming Register. */
|
| 422 |
break;
|
| 423 |
|
| 424 |
case 0x0580: |
| 425 |
/* TTR: TIGbus Timing Register. */
|
| 426 |
/* All sorts of stuff related to interrupt delivery timings. */
|
| 427 |
break;
|
| 428 |
case 0x05c0: |
| 429 |
/* TDR: TIGbug Device Timing Register. */
|
| 430 |
break;
|
| 431 |
|
| 432 |
case 0x0600: |
| 433 |
/* DIM2: Device Interrupt Mask Register, CPU2. */
|
| 434 |
s->cchip.dim[2] = val;
|
| 435 |
cpu_irq_change(s->cchip.cpu[2], val & s->cchip.drir);
|
| 436 |
break;
|
| 437 |
case 0x0640: |
| 438 |
/* DIM3: Device Interrupt Mask Register, CPU3. */
|
| 439 |
s->cchip.dim[3] = val;
|
| 440 |
cpu_irq_change(s->cchip.cpu[3], val & s->cchip.drir);
|
| 441 |
break;
|
| 442 |
|
| 443 |
case 0x0680: /* DIR2 (RO) */ |
| 444 |
case 0x06c0: /* DIR3 (RO) */ |
| 445 |
break;
|
| 446 |
|
| 447 |
case 0x0700: /* IIC2 */ |
| 448 |
s->cchip.iic[2] = val & 0xffffff; |
| 449 |
break;
|
| 450 |
case 0x0740: /* IIC3 */ |
| 451 |
s->cchip.iic[3] = val & 0xffffff; |
| 452 |
break;
|
| 453 |
|
| 454 |
case 0x0780: |
| 455 |
/* PWR: Power Management Control. */
|
| 456 |
break;
|
| 457 |
|
| 458 |
case 0x0c00: /* CMONCTLA */ |
| 459 |
case 0x0c40: /* CMONCTLB */ |
| 460 |
case 0x0c80: /* CMONCNT01 */ |
| 461 |
case 0x0cc0: /* CMONCNT23 */ |
| 462 |
break;
|
| 463 |
|
| 464 |
default:
|
| 465 |
cpu_unassigned_access(cpu_single_env, addr, 1, 0, 0, size); |
| 466 |
return;
|
| 467 |
} |
| 468 |
} |
| 469 |
|
| 470 |
static void dchip_write(void *opaque, hwaddr addr, |
| 471 |
uint64_t val, unsigned size)
|
| 472 |
{
|
| 473 |
/* Skip this. It's all related to DRAM timing and setup. */
|
| 474 |
} |
| 475 |
|
| 476 |
static void pchip_write(void *opaque, hwaddr addr, |
| 477 |
uint64_t v32, unsigned size)
|
| 478 |
{
|
| 479 |
TyphoonState *s = opaque; |
| 480 |
uint64_t val, oldval; |
| 481 |
|
| 482 |
if (addr & 4) { |
| 483 |
val = v32 << 32 | s->latch_tmp;
|
| 484 |
addr ^= 4;
|
| 485 |
} else {
|
| 486 |
s->latch_tmp = v32; |
| 487 |
return;
|
| 488 |
} |
| 489 |
|
| 490 |
switch (addr) {
|
| 491 |
case 0x0000: |
| 492 |
/* WSBA0: Window Space Base Address Register. */
|
| 493 |
s->pchip.win[0].base_addr = val;
|
| 494 |
break;
|
| 495 |
case 0x0040: |
| 496 |
/* WSBA1 */
|
| 497 |
s->pchip.win[1].base_addr = val;
|
| 498 |
break;
|
| 499 |
case 0x0080: |
| 500 |
/* WSBA2 */
|
| 501 |
s->pchip.win[2].base_addr = val;
|
| 502 |
break;
|
| 503 |
case 0x00c0: |
| 504 |
/* WSBA3 */
|
| 505 |
s->pchip.win[3].base_addr = val;
|
| 506 |
break;
|
| 507 |
|
| 508 |
case 0x0100: |
| 509 |
/* WSM0: Window Space Mask Register. */
|
| 510 |
s->pchip.win[0].mask = val;
|
| 511 |
break;
|
| 512 |
case 0x0140: |
| 513 |
/* WSM1 */
|
| 514 |
s->pchip.win[1].mask = val;
|
| 515 |
break;
|
| 516 |
case 0x0180: |
| 517 |
/* WSM2 */
|
| 518 |
s->pchip.win[2].mask = val;
|
| 519 |
break;
|
| 520 |
case 0x01c0: |
| 521 |
/* WSM3 */
|
| 522 |
s->pchip.win[3].mask = val;
|
| 523 |
break;
|
| 524 |
|
| 525 |
case 0x0200: |
| 526 |
/* TBA0: Translated Base Address Register. */
|
| 527 |
s->pchip.win[0].translated_base_pfn = val >> 10; |
| 528 |
break;
|
| 529 |
case 0x0240: |
| 530 |
/* TBA1 */
|
| 531 |
s->pchip.win[1].translated_base_pfn = val >> 10; |
| 532 |
break;
|
| 533 |
case 0x0280: |
| 534 |
/* TBA2 */
|
| 535 |
s->pchip.win[2].translated_base_pfn = val >> 10; |
| 536 |
break;
|
| 537 |
case 0x02c0: |
| 538 |
/* TBA3 */
|
| 539 |
s->pchip.win[3].translated_base_pfn = val >> 10; |
| 540 |
break;
|
| 541 |
|
| 542 |
case 0x0300: |
| 543 |
/* PCTL: Pchip Control Register. */
|
| 544 |
oldval = s->pchip.ctl; |
| 545 |
oldval &= ~0x00001cff0fc7ffull; /* RW fields */ |
| 546 |
oldval |= val & 0x00001cff0fc7ffull;
|
| 547 |
|
| 548 |
s->pchip.ctl = oldval; |
| 549 |
break;
|
| 550 |
|
| 551 |
case 0x0340: |
| 552 |
/* PLAT: Pchip Master Latency Register. */
|
| 553 |
break;
|
| 554 |
case 0x03c0: |
| 555 |
/* PERROR: Pchip Error Register. */
|
| 556 |
break;
|
| 557 |
case 0x0400: |
| 558 |
/* PERRMASK: Pchip Error Mask Register. */
|
| 559 |
break;
|
| 560 |
case 0x0440: |
| 561 |
/* PERRSET: Pchip Error Set Register. */
|
| 562 |
break;
|
| 563 |
|
| 564 |
case 0x0480: |
| 565 |
/* TLBIV: Translation Buffer Invalidate Virtual Register. */
|
| 566 |
break;
|
| 567 |
|
| 568 |
case 0x04c0: |
| 569 |
/* TLBIA: Translation Buffer Invalidate All Register (WO). */
|
| 570 |
break;
|
| 571 |
|
| 572 |
case 0x0500: |
| 573 |
/* PMONCTL */
|
| 574 |
case 0x0540: |
| 575 |
/* PMONCNT */
|
| 576 |
case 0x0800: |
| 577 |
/* SPRST */
|
| 578 |
break;
|
| 579 |
|
| 580 |
default:
|
| 581 |
cpu_unassigned_access(cpu_single_env, addr, 1, 0, 0, size); |
| 582 |
return;
|
| 583 |
} |
| 584 |
} |
| 585 |
|
| 586 |
static const MemoryRegionOps cchip_ops = { |
| 587 |
.read = cchip_read, |
| 588 |
.write = cchip_write, |
| 589 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 590 |
.valid = {
|
| 591 |
.min_access_size = 4, /* ??? Should be 8. */ |
| 592 |
.max_access_size = 8,
|
| 593 |
}, |
| 594 |
.impl = {
|
| 595 |
.min_access_size = 4,
|
| 596 |
.max_access_size = 4,
|
| 597 |
}, |
| 598 |
}; |
| 599 |
|
| 600 |
static const MemoryRegionOps dchip_ops = { |
| 601 |
.read = dchip_read, |
| 602 |
.write = dchip_write, |
| 603 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 604 |
.valid = {
|
| 605 |
.min_access_size = 4, /* ??? Should be 8. */ |
| 606 |
.max_access_size = 8,
|
| 607 |
}, |
| 608 |
.impl = {
|
| 609 |
.min_access_size = 4,
|
| 610 |
.max_access_size = 8,
|
| 611 |
}, |
| 612 |
}; |
| 613 |
|
| 614 |
static const MemoryRegionOps pchip_ops = { |
| 615 |
.read = pchip_read, |
| 616 |
.write = pchip_write, |
| 617 |
.endianness = DEVICE_LITTLE_ENDIAN, |
| 618 |
.valid = {
|
| 619 |
.min_access_size = 4, /* ??? Should be 8. */ |
| 620 |
.max_access_size = 8,
|
| 621 |
}, |
| 622 |
.impl = {
|
| 623 |
.min_access_size = 4,
|
| 624 |
.max_access_size = 4,
|
| 625 |
}, |
| 626 |
}; |
| 627 |
|
| 628 |
static void typhoon_set_irq(void *opaque, int irq, int level) |
| 629 |
{
|
| 630 |
TyphoonState *s = opaque; |
| 631 |
uint64_t drir; |
| 632 |
int i;
|
| 633 |
|
| 634 |
/* Set/Reset the bit in CCHIP.DRIR based on IRQ+LEVEL. */
|
| 635 |
drir = s->cchip.drir; |
| 636 |
if (level) {
|
| 637 |
drir |= 1ull << irq;
|
| 638 |
} else {
|
| 639 |
drir &= ~(1ull << irq);
|
| 640 |
} |
| 641 |
s->cchip.drir = drir; |
| 642 |
|
| 643 |
for (i = 0; i < 4; ++i) { |
| 644 |
cpu_irq_change(s->cchip.cpu[i], s->cchip.dim[i] & drir); |
| 645 |
} |
| 646 |
} |
| 647 |
|
| 648 |
static void typhoon_set_isa_irq(void *opaque, int irq, int level) |
| 649 |
{
|
| 650 |
typhoon_set_irq(opaque, 55, level);
|
| 651 |
} |
| 652 |
|
| 653 |
static void typhoon_set_timer_irq(void *opaque, int irq, int level) |
| 654 |
{
|
| 655 |
TyphoonState *s = opaque; |
| 656 |
int i;
|
| 657 |
|
| 658 |
/* Thankfully, the mc146818rtc code doesn't track the IRQ state,
|
| 659 |
and so we don't have to worry about missing interrupts just
|
| 660 |
because we never actually ACK the interrupt. Just ignore any
|
| 661 |
case of the interrupt level going low. */
|
| 662 |
if (level == 0) { |
| 663 |
return;
|
| 664 |
} |
| 665 |
|
| 666 |
/* Deliver the interrupt to each CPU, considering each CPU's IIC. */
|
| 667 |
for (i = 0; i < 4; ++i) { |
| 668 |
AlphaCPU *cpu = s->cchip.cpu[i]; |
| 669 |
if (cpu != NULL) { |
| 670 |
uint32_t iic = s->cchip.iic[i]; |
| 671 |
|
| 672 |
/* ??? The verbage in Section 10.2.2.10 isn't 100% clear.
|
| 673 |
Bit 24 is the OverFlow bit, RO, and set when the count
|
| 674 |
decrements past 0. When is OF cleared? My guess is that
|
| 675 |
OF is actually cleared when the IIC is written, and that
|
| 676 |
the ICNT field always decrements. At least, that's an
|
| 677 |
interpretation that makes sense, and "allows the CPU to
|
| 678 |
determine exactly how mant interval timer ticks were
|
| 679 |
skipped". At least within the next 4M ticks... */
|
| 680 |
|
| 681 |
iic = ((iic - 1) & 0x1ffffff) | (iic & 0x1000000); |
| 682 |
s->cchip.iic[i] = iic; |
| 683 |
|
| 684 |
if (iic & 0x1000000) { |
| 685 |
/* Set the ITI bit for this cpu. */
|
| 686 |
s->cchip.misc |= 1 << (i + 4); |
| 687 |
/* And signal the interrupt. */
|
| 688 |
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_TIMER); |
| 689 |
} |
| 690 |
} |
| 691 |
} |
| 692 |
} |
| 693 |
|
| 694 |
static void typhoon_alarm_timer(void *opaque) |
| 695 |
{
|
| 696 |
TyphoonState *s = (TyphoonState *)((uintptr_t)opaque & ~3);
|
| 697 |
int cpu = (uintptr_t)opaque & 3; |
| 698 |
|
| 699 |
/* Set the ITI bit for this cpu. */
|
| 700 |
s->cchip.misc |= 1 << (cpu + 4); |
| 701 |
cpu_interrupt(CPU(s->cchip.cpu[cpu]), CPU_INTERRUPT_TIMER); |
| 702 |
} |
| 703 |
|
| 704 |
PCIBus *typhoon_init(ram_addr_t ram_size, ISABus **isa_bus, |
| 705 |
qemu_irq *p_rtc_irq, |
| 706 |
AlphaCPU *cpus[4], pci_map_irq_fn sys_map_irq)
|
| 707 |
{
|
| 708 |
const uint64_t MB = 1024 * 1024; |
| 709 |
const uint64_t GB = 1024 * MB; |
| 710 |
MemoryRegion *addr_space = get_system_memory(); |
| 711 |
MemoryRegion *addr_space_io = get_system_io(); |
| 712 |
DeviceState *dev; |
| 713 |
TyphoonState *s; |
| 714 |
PCIHostState *phb; |
| 715 |
PCIBus *b; |
| 716 |
int i;
|
| 717 |
|
| 718 |
dev = qdev_create(NULL, TYPE_TYPHOON_PCI_HOST_BRIDGE);
|
| 719 |
qdev_init_nofail(dev); |
| 720 |
|
| 721 |
s = TYPHOON_PCI_HOST_BRIDGE(dev); |
| 722 |
phb = PCI_HOST_BRIDGE(dev); |
| 723 |
|
| 724 |
/* Remember the CPUs so that we can deliver interrupts to them. */
|
| 725 |
for (i = 0; i < 4; i++) { |
| 726 |
AlphaCPU *cpu = cpus[i]; |
| 727 |
s->cchip.cpu[i] = cpu; |
| 728 |
if (cpu != NULL) { |
| 729 |
cpu->alarm_timer = qemu_new_timer_ns(rtc_clock, |
| 730 |
typhoon_alarm_timer, |
| 731 |
(void *)((uintptr_t)s + i));
|
| 732 |
} |
| 733 |
} |
| 734 |
|
| 735 |
*p_rtc_irq = *qemu_allocate_irqs(typhoon_set_timer_irq, s, 1);
|
| 736 |
|
| 737 |
/* Main memory region, 0x00.0000.0000. Real hardware supports 32GB,
|
| 738 |
but the address space hole reserved at this point is 8TB. */
|
| 739 |
memory_region_init_ram(&s->ram_region, "ram", ram_size);
|
| 740 |
vmstate_register_ram_global(&s->ram_region); |
| 741 |
memory_region_add_subregion(addr_space, 0, &s->ram_region);
|
| 742 |
|
| 743 |
/* TIGbus, 0x801.0000.0000, 1GB. */
|
| 744 |
/* ??? The TIGbus is used for delivering interrupts, and access to
|
| 745 |
the flash ROM. I'm not sure that we need to implement it at all. */
|
| 746 |
|
| 747 |
/* Pchip0 CSRs, 0x801.8000.0000, 256MB. */
|
| 748 |
memory_region_init_io(&s->pchip.region, &pchip_ops, s, "pchip0", 256*MB); |
| 749 |
memory_region_add_subregion(addr_space, 0x80180000000ULL,
|
| 750 |
&s->pchip.region); |
| 751 |
|
| 752 |
/* Cchip CSRs, 0x801.A000.0000, 256MB. */
|
| 753 |
memory_region_init_io(&s->cchip.region, &cchip_ops, s, "cchip0", 256*MB); |
| 754 |
memory_region_add_subregion(addr_space, 0x801a0000000ULL,
|
| 755 |
&s->cchip.region); |
| 756 |
|
| 757 |
/* Dchip CSRs, 0x801.B000.0000, 256MB. */
|
| 758 |
memory_region_init_io(&s->dchip_region, &dchip_ops, s, "dchip0", 256*MB); |
| 759 |
memory_region_add_subregion(addr_space, 0x801b0000000ULL,
|
| 760 |
&s->dchip_region); |
| 761 |
|
| 762 |
/* Pchip0 PCI memory, 0x800.0000.0000, 4GB. */
|
| 763 |
memory_region_init(&s->pchip.reg_mem, "pci0-mem", 4*GB); |
| 764 |
memory_region_add_subregion(addr_space, 0x80000000000ULL,
|
| 765 |
&s->pchip.reg_mem); |
| 766 |
|
| 767 |
/* Pchip0 PCI I/O, 0x801.FC00.0000, 32MB. */
|
| 768 |
/* ??? Ideally we drop the "system" i/o space on the floor and give the
|
| 769 |
PCI subsystem the full address space reserved by the chipset.
|
| 770 |
We can't do that until the MEM and IO paths in memory.c are unified. */
|
| 771 |
memory_region_init_io(&s->pchip.reg_io, &alpha_pci_bw_io_ops, NULL,
|
| 772 |
"pci0-io", 32*MB); |
| 773 |
memory_region_add_subregion(addr_space, 0x801fc000000ULL,
|
| 774 |
&s->pchip.reg_io); |
| 775 |
|
| 776 |
b = pci_register_bus(dev, "pci",
|
| 777 |
typhoon_set_irq, sys_map_irq, s, |
| 778 |
&s->pchip.reg_mem, addr_space_io, 0, 64, TYPE_PCI_BUS); |
| 779 |
phb->bus = b; |
| 780 |
|
| 781 |
/* Pchip0 PCI special/interrupt acknowledge, 0x801.F800.0000, 64MB. */
|
| 782 |
memory_region_init_io(&s->pchip.reg_iack, &alpha_pci_iack_ops, b, |
| 783 |
"pci0-iack", 64*MB); |
| 784 |
memory_region_add_subregion(addr_space, 0x801f8000000ULL,
|
| 785 |
&s->pchip.reg_iack); |
| 786 |
|
| 787 |
/* Pchip0 PCI configuration, 0x801.FE00.0000, 16MB. */
|
| 788 |
memory_region_init_io(&s->pchip.reg_conf, &alpha_pci_conf1_ops, b, |
| 789 |
"pci0-conf", 16*MB); |
| 790 |
memory_region_add_subregion(addr_space, 0x801fe000000ULL,
|
| 791 |
&s->pchip.reg_conf); |
| 792 |
|
| 793 |
/* For the record, these are the mappings for the second PCI bus.
|
| 794 |
We can get away with not implementing them because we indicate
|
| 795 |
via the Cchip.CSC<PIP> bit that Pchip1 is not present. */
|
| 796 |
/* Pchip1 PCI memory, 0x802.0000.0000, 4GB. */
|
| 797 |
/* Pchip1 CSRs, 0x802.8000.0000, 256MB. */
|
| 798 |
/* Pchip1 PCI special/interrupt acknowledge, 0x802.F800.0000, 64MB. */
|
| 799 |
/* Pchip1 PCI I/O, 0x802.FC00.0000, 32MB. */
|
| 800 |
/* Pchip1 PCI configuration, 0x802.FE00.0000, 16MB. */
|
| 801 |
|
| 802 |
/* Init the ISA bus. */
|
| 803 |
/* ??? Technically there should be a cy82c693ub pci-isa bridge. */
|
| 804 |
{
|
| 805 |
qemu_irq isa_pci_irq, *isa_irqs; |
| 806 |
|
| 807 |
*isa_bus = isa_bus_new(NULL, addr_space_io);
|
| 808 |
isa_pci_irq = *qemu_allocate_irqs(typhoon_set_isa_irq, s, 1);
|
| 809 |
isa_irqs = i8259_init(*isa_bus, isa_pci_irq); |
| 810 |
isa_bus_irqs(*isa_bus, isa_irqs); |
| 811 |
} |
| 812 |
|
| 813 |
return b;
|
| 814 |
} |
| 815 |
|
| 816 |
static int typhoon_pcihost_init(SysBusDevice *dev) |
| 817 |
{
|
| 818 |
return 0; |
| 819 |
} |
| 820 |
|
| 821 |
static void typhoon_pcihost_class_init(ObjectClass *klass, void *data) |
| 822 |
{
|
| 823 |
DeviceClass *dc = DEVICE_CLASS(klass); |
| 824 |
SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
| 825 |
|
| 826 |
k->init = typhoon_pcihost_init; |
| 827 |
dc->no_user = 1;
|
| 828 |
} |
| 829 |
|
| 830 |
static const TypeInfo typhoon_pcihost_info = { |
| 831 |
.name = TYPE_TYPHOON_PCI_HOST_BRIDGE, |
| 832 |
.parent = TYPE_PCI_HOST_BRIDGE, |
| 833 |
.instance_size = sizeof(TyphoonState),
|
| 834 |
.class_init = typhoon_pcihost_class_init, |
| 835 |
}; |
| 836 |
|
| 837 |
static void typhoon_register_types(void) |
| 838 |
{
|
| 839 |
type_register_static(&typhoon_pcihost_info); |
| 840 |
} |
| 841 |
|
| 842 |
type_init(typhoon_register_types) |