diff options
Diffstat (limited to 'target-arm')
| -rw-r--r-- | target-arm/cpu.h | 4 | ||||
| -rw-r--r-- | target-arm/helper.c | 41 |
2 files changed, 23 insertions, 22 deletions
diff --git a/target-arm/cpu.h b/target-arm/cpu.h index ff765f7838..c18224510b 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -107,7 +107,9 @@ typedef struct CPUARMState { uint32_t c1_xscaleauxcr; /* XScale auxiliary control register. */ uint32_t c2_base0; /* MMU translation table base 0. */ uint32_t c2_base1; /* MMU translation table base 1. */ - uint32_t c2_mask; /* MMU translation table base mask. */ + uint32_t c2_control; /* MMU translation table base control. */ + uint32_t c2_mask; /* MMU translation table base selection mask. */ + uint32_t c2_base_mask; /* MMU translation table base 0 mask. */ uint32_t c2_data; /* MPU data cachable bits. */ uint32_t c2_insn; /* MPU instruction cachable bits. */ uint32_t c3; /* MMU domain access control register diff --git a/target-arm/helper.c b/target-arm/helper.c index d4af8595ca..a9b31e5d6b 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -168,6 +168,7 @@ void cpu_reset(CPUARMState *env) if (IS_M(env)) env->uncached_cpsr &= ~CPSR_I; env->vfp.xregs[ARM_VFP_FPEXC] = 0; + env->cp15.c2_base_mask = 0xffffc000u; #endif env->regs[15] = 0; tlb_flush(env, 1); @@ -910,6 +911,19 @@ static inline int check_ap(CPUState *env, int ap, int domain, int access_type, } } +static uint32_t get_level1_table_address(CPUState *env, uint32_t address) +{ + uint32_t table; + + if (address & env->cp15.c2_mask) + table = env->cp15.c2_base1 & 0xffffc000; + else + table = env->cp15.c2_base0 & env->cp15.c2_base_mask; + + table |= (address >> 18) & 0x3ffc; + return table; +} + static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type, int is_user, uint32_t *phys_ptr, int *prot) { @@ -923,11 +937,7 @@ static int get_phys_addr_v5(CPUState *env, uint32_t address, int access_type, /* Pagetable walk. */ /* Lookup l1 descriptor. */ - if (address & env->cp15.c2_mask) - table = env->cp15.c2_base1; - else - table = env->cp15.c2_base0; - table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc); + table = get_level1_table_address(env, address); desc = ldl_phys(table); type = (desc & 3); domain = (env->cp15.c3 >> ((desc >> 4) & 0x1e)) & 3; @@ -1015,11 +1025,7 @@ static int get_phys_addr_v6(CPUState *env, uint32_t address, int access_type, /* Pagetable walk. */ /* Lookup l1 descriptor. */ - if (address & env->cp15.c2_mask) - table = env->cp15.c2_base1; - else - table = env->cp15.c2_base0; - table = (table & 0xffffc000) | ((address >> 18) & 0x3ffc); + table = get_level1_table_address(env, address); desc = ldl_phys(table); type = (desc & 3); if (type == 0) { @@ -1365,7 +1371,10 @@ void HELPER(set_cp15)(CPUState *env, uint32_t insn, uint32_t val) env->cp15.c2_base1 = val; break; case 2: + val &= 7; + env->cp15.c2_control = val; env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> val); + env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> val); break; default: goto bad_reg; @@ -1683,17 +1692,7 @@ uint32_t HELPER(get_cp15)(CPUState *env, uint32_t insn) case 1: return env->cp15.c2_base1; case 2: - { - int n; - uint32_t mask; - n = 0; - mask = env->cp15.c2_mask; - while (mask) { - n++; - mask <<= 1; - } - return n; - } + return env->cp15.c2_control; default: goto bad_reg; } |