diff options
Diffstat (limited to 'hw/misc')
| -rw-r--r-- | hw/misc/mips_itu.c | 73 |
1 files changed, 66 insertions, 7 deletions
diff --git a/hw/misc/mips_itu.c b/hw/misc/mips_itu.c index 43bbec4..1257d8f 100644 --- a/hw/misc/mips_itu.c +++ b/hw/misc/mips_itu.c @@ -55,9 +55,17 @@ typedef enum ITCView { ITCVIEW_EF_SYNC = 2, ITCVIEW_EF_TRY = 3, ITCVIEW_PV_SYNC = 4, - ITCVIEW_PV_TRY = 5 + ITCVIEW_PV_TRY = 5, + ITCVIEW_PV_ICR0 = 15, } ITCView; +#define ITC_ICR0_CELL_NUM 16 +#define ITC_ICR0_BLK_GRAIN 8 +#define ITC_ICR0_BLK_GRAIN_MASK 0x7 +#define ITC_ICR0_ERR_AXI 2 +#define ITC_ICR0_ERR_PARITY 1 +#define ITC_ICR0_ERR_EXEC 0 + MemoryRegion *mips_itu_get_tag_region(MIPSITUState *itu) { return &itu->tag_io; @@ -76,7 +84,7 @@ static uint64_t itc_tag_read(void *opaque, hwaddr addr, unsigned size) return tag->ITCAddressMap[index]; } -static void itc_reconfigure(MIPSITUState *tag) +void itc_reconfigure(MIPSITUState *tag) { uint64_t *am = &tag->ITCAddressMap[0]; MemoryRegion *mr = &tag->storage_io; @@ -84,6 +92,12 @@ static void itc_reconfigure(MIPSITUState *tag) uint64_t size = (1 * KiB) + (am[1] & ITC_AM1_ADDR_MASK_MASK); bool is_enabled = (am[0] & ITC_AM0_EN_MASK) != 0; + if (tag->saar_present) { + address = ((*(uint64_t *) tag->saar) & 0xFFFFFFFFE000ULL) << 4; + size = 1 << ((*(uint64_t *) tag->saar >> 1) & 0x1f); + is_enabled = *(uint64_t *) tag->saar & 1; + } + memory_region_transaction_begin(); if (!(size & (size - 1))) { memory_region_set_size(mr, size); @@ -142,7 +156,12 @@ static inline ITCView get_itc_view(hwaddr addr) static inline int get_cell_stride_shift(const MIPSITUState *s) { /* Minimum interval (for EntryGain = 0) is 128 B */ - return 7 + (s->ITCAddressMap[1] & ITC_AM1_ENTRY_GRAIN_MASK); + if (s->saar_present) { + return 7 + ((s->icr0 >> ITC_ICR0_BLK_GRAIN) & + ITC_ICR0_BLK_GRAIN_MASK); + } else { + return 7 + (s->ITCAddressMap[1] & ITC_AM1_ENTRY_GRAIN_MASK); + } } static inline ITCStorageCell *get_cell(MIPSITUState *s, @@ -356,6 +375,12 @@ static void view_pv_try_write(ITCStorageCell *c) view_pv_common_write(c); } +static void raise_exception(int excp) +{ + current_cpu->exception_index = excp; + cpu_loop_exit(current_cpu); +} + static uint64_t itc_storage_read(void *opaque, hwaddr addr, unsigned size) { MIPSITUState *s = (MIPSITUState *)opaque; @@ -363,6 +388,14 @@ static uint64_t itc_storage_read(void *opaque, hwaddr addr, unsigned size) ITCView view = get_itc_view(addr); uint64_t ret = -1; + switch (size) { + case 1: + case 2: + s->icr0 |= 1 << ITC_ICR0_ERR_AXI; + raise_exception(EXCP_DBE); + return 0; + } + switch (view) { case ITCVIEW_BYPASS: ret = view_bypass_read(cell); @@ -382,6 +415,9 @@ static uint64_t itc_storage_read(void *opaque, hwaddr addr, unsigned size) case ITCVIEW_PV_TRY: ret = view_pv_try_read(cell); break; + case ITCVIEW_PV_ICR0: + ret = s->icr0; + break; default: qemu_log_mask(LOG_GUEST_ERROR, "itc_storage_read: Bad ITC View %d\n", (int)view); @@ -398,6 +434,14 @@ static void itc_storage_write(void *opaque, hwaddr addr, uint64_t data, ITCStorageCell *cell = get_cell(s, addr); ITCView view = get_itc_view(addr); + switch (size) { + case 1: + case 2: + s->icr0 |= 1 << ITC_ICR0_ERR_AXI; + raise_exception(EXCP_DBE); + return; + } + switch (view) { case ITCVIEW_BYPASS: view_bypass_write(cell, data); @@ -417,6 +461,15 @@ static void itc_storage_write(void *opaque, hwaddr addr, uint64_t data, case ITCVIEW_PV_TRY: view_pv_try_write(cell); break; + case ITCVIEW_PV_ICR0: + if (data & 0x7) { + /* clear ERROR bits */ + s->icr0 &= ~(data & 0x7); + } + /* set BLK_GRAIN */ + s->icr0 &= ~0x700; + s->icr0 |= data & 0x700; + break; default: qemu_log_mask(LOG_GUEST_ERROR, "itc_storage_write: Bad ITC View %d\n", (int)view); @@ -479,10 +532,15 @@ static void mips_itu_reset(DeviceState *dev) { MIPSITUState *s = MIPS_ITU(dev); - s->ITCAddressMap[0] = 0; - s->ITCAddressMap[1] = - ((ITC_STORAGE_ADDRSPACE_SZ - 1) & ITC_AM1_ADDR_MASK_MASK) | - (get_num_cells(s) << ITC_AM1_NUMENTRIES_OFS); + if (s->saar_present) { + *(uint64_t *) s->saar = 0x11 << 1; + s->icr0 = get_num_cells(s) << ITC_ICR0_CELL_NUM; + } else { + s->ITCAddressMap[0] = 0; + s->ITCAddressMap[1] = + ((ITC_STORAGE_ADDRSPACE_SZ - 1) & ITC_AM1_ADDR_MASK_MASK) | + (get_num_cells(s) << ITC_AM1_NUMENTRIES_OFS); + } itc_reconfigure(s); itc_reset_cells(s); @@ -493,6 +551,7 @@ static Property mips_itu_properties[] = { ITC_FIFO_NUM_MAX), DEFINE_PROP_INT32("num-semaphores", MIPSITUState, num_semaphores, ITC_SEMAPH_NUM_MAX), + DEFINE_PROP_BOOL("saar-present", MIPSITUState, saar_present, false), DEFINE_PROP_END_OF_LIST(), }; |