diff options
Diffstat (limited to 'hw/iommu.c')
| -rw-r--r-- | hw/iommu.c | 58 |
1 files changed, 55 insertions, 3 deletions
diff --git a/hw/iommu.c b/hw/iommu.c index d0b16ea88a..6defe61caf 100644 --- a/hw/iommu.c +++ b/hw/iommu.c @@ -33,9 +33,11 @@ do { printf("IOMMU: " fmt , ##args); } while (0) #define DPRINTF(fmt, args...) #endif -#define IOMMU_NREGS (3*4096) +#define IOMMU_NREGS (3*4096/4) +#define IOMMU_CTRL (0x0000 >> 2) #define IOMMU_CTRL_IMPL 0xf0000000 /* Implementation */ #define IOMMU_CTRL_VERS 0x0f000000 /* Version */ +#define IOMMU_VERSION 0x04000000 #define IOMMU_CTRL_RNGE 0x0000001c /* Mapping RANGE */ #define IOMMU_RNGE_16MB 0x00000000 /* 0xff000000 -> 0xffffffff */ #define IOMMU_RNGE_32MB 0x00000004 /* 0xfe000000 -> 0xffffffff */ @@ -46,6 +48,32 @@ do { printf("IOMMU: " fmt , ##args); } while (0) #define IOMMU_RNGE_1GB 0x00000018 /* 0xc0000000 -> 0xffffffff */ #define IOMMU_RNGE_2GB 0x0000001c /* 0x80000000 -> 0xffffffff */ #define IOMMU_CTRL_ENAB 0x00000001 /* IOMMU Enable */ +#define IOMMU_CTRL_MASK 0x0000001d + +#define IOMMU_BASE (0x0004 >> 2) +#define IOMMU_BASE_MASK 0x07fffc00 + +#define IOMMU_TLBFLUSH (0x0014 >> 2) +#define IOMMU_TLBFLUSH_MASK 0xffffffff + +#define IOMMU_PGFLUSH (0x0018 >> 2) +#define IOMMU_PGFLUSH_MASK 0xffffffff + +#define IOMMU_SBCFG0 (0x1010 >> 2) /* SBUS configration per-slot */ +#define IOMMU_SBCFG1 (0x1014 >> 2) /* SBUS configration per-slot */ +#define IOMMU_SBCFG2 (0x1018 >> 2) /* SBUS configration per-slot */ +#define IOMMU_SBCFG3 (0x101c >> 2) /* SBUS configration per-slot */ +#define IOMMU_SBCFG_SAB30 0x00010000 /* Phys-address bit 30 when bypass enabled */ +#define IOMMU_SBCFG_BA16 0x00000004 /* Slave supports 16 byte bursts */ +#define IOMMU_SBCFG_BA8 0x00000002 /* Slave supports 8 byte bursts */ +#define IOMMU_SBCFG_BYPASS 0x00000001 /* Bypass IOMMU, treat all addresses + produced by this device as pure + physical. */ +#define IOMMU_SBCFG_MASK 0x00010003 + +#define IOMMU_ARBEN (0x2000 >> 2) /* SBUS arbitration enable */ +#define IOMMU_ARBEN_MASK 0x001f0000 +#define IOMMU_MID 0x00000008 /* The format of an iopte in the page tables */ #define IOPTE_PAGE 0x07ffff00 /* Physical page number (PA[30:12]) */ @@ -87,7 +115,7 @@ static void iommu_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val saddr = (addr - s->addr) >> 2; DPRINTF("write reg[%d] = %x\n", saddr, val); switch (saddr) { - case 0: + case IOMMU_CTRL: switch (val & IOMMU_CTRL_RNGE) { case IOMMU_RNGE_16MB: s->iostart = 0xff000000; @@ -116,7 +144,30 @@ static void iommu_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t val break; } DPRINTF("iostart = %x\n", s->iostart); - /* Fall through */ + s->regs[saddr] = ((val & IOMMU_CTRL_MASK) | IOMMU_VERSION); + break; + case IOMMU_BASE: + s->regs[saddr] = val & IOMMU_BASE_MASK; + break; + case IOMMU_TLBFLUSH: + DPRINTF("tlb flush %x\n", val); + s->regs[saddr] = val & IOMMU_TLBFLUSH_MASK; + break; + case IOMMU_PGFLUSH: + DPRINTF("page flush %x\n", val); + s->regs[saddr] = val & IOMMU_PGFLUSH_MASK; + break; + case IOMMU_SBCFG0: + case IOMMU_SBCFG1: + case IOMMU_SBCFG2: + case IOMMU_SBCFG3: + s->regs[saddr] = val & IOMMU_SBCFG_MASK; + break; + case IOMMU_ARBEN: + // XXX implement SBus probing: fault when reading unmapped + // addresses, fault cause and address stored to MMU/IOMMU + s->regs[saddr] = (val & IOMMU_ARBEN_MASK) | IOMMU_MID; + break; default: s->regs[saddr] = val; break; @@ -184,6 +235,7 @@ static void iommu_reset(void *opaque) memset(s->regs, 0, IOMMU_NREGS * 4); s->iostart = 0; + s->regs[0] = IOMMU_VERSION; } void *iommu_init(uint32_t addr) |