diff options
Diffstat (limited to 'target-arm/helper.c')
| -rw-r--r-- | target-arm/helper.c | 79 |
1 files changed, 69 insertions, 10 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index d66bc3e832..110858dde1 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -503,6 +503,17 @@ static int par_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) #ifndef CONFIG_USER_ONLY /* get_phys_addr() isn't present for user-mode-only targets */ + +/* Return true if extended addresses are enabled, ie this is an + * LPAE implementation and we are using the long-descriptor translation + * table format because the TTBCR EAE bit is set. + */ +static inline bool extended_addresses_enabled(CPUARMState *env) +{ + return arm_feature(env, ARM_FEATURE_LPAE) + && (env->cp15.c2_control & (1 << 31)); +} + static int ats_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) { target_phys_addr_t phys_addr; @@ -517,20 +528,45 @@ static int ats_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value) } ret = get_phys_addr(env, value, access_type, is_user, &phys_addr, &prot, &page_size); - if (ret == 0) { - /* We do not set any attribute bits in the PAR */ - if (page_size == (1 << 24) - && arm_feature(env, ARM_FEATURE_V7)) { - env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1; + if (extended_addresses_enabled(env)) { + /* ret is a DFSR/IFSR value for the long descriptor + * translation table format, but with WnR always clear. + * Convert it to a 64-bit PAR. + */ + uint64_t par64 = (1 << 11); /* LPAE bit always set */ + if (ret == 0) { + par64 |= phys_addr & ~0xfffULL; + /* We don't set the ATTR or SH fields in the PAR. */ } else { - env->cp15.c7_par = phys_addr & 0xfffff000; + par64 |= 1; /* F */ + par64 |= (ret & 0x3f) << 1; /* FS */ + /* Note that S2WLK and FSTAGE are always zero, because we don't + * implement virtualization and therefore there can't be a stage 2 + * fault. + */ } + env->cp15.c7_par = par64; + env->cp15.c7_par_hi = par64 >> 32; } else { - env->cp15.c7_par = ((ret & (10 << 1)) >> 5) | - ((ret & (12 << 1)) >> 6) | - ((ret & 0xf) << 1) | 1; + /* ret is a DFSR/IFSR value for the short descriptor + * translation table format (with WnR always clear). + * Convert it to a 32-bit PAR. + */ + if (ret == 0) { + /* We do not set any attribute bits in the PAR */ + if (page_size == (1 << 24) + && arm_feature(env, ARM_FEATURE_V7)) { + env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1; + } else { + env->cp15.c7_par = phys_addr & 0xfffff000; + } + } else { + env->cp15.c7_par = ((ret & (10 << 1)) >> 5) | + ((ret & (12 << 1)) >> 6) | + ((ret & 0xf) << 1) | 1; + } + env->cp15.c7_par_hi = 0; } - env->cp15.c7_par_hi = 0; return 0; } #endif @@ -2196,6 +2232,29 @@ static int get_phys_addr_mpu(CPUARMState *env, uint32_t address, return 0; } +/* get_phys_addr - get the physical address for this virtual address + * + * Find the physical address corresponding to the given virtual address, + * by doing a translation table walk on MMU based systems or using the + * MPU state on MPU based systems. + * + * Returns 0 if the translation was successful. Otherwise, phys_ptr, + * prot and page_size are not filled in, and the return value provides + * information on why the translation aborted, in the format of a + * DFSR/IFSR fault register, with the following caveats: + * * we honour the short vs long DFSR format differences. + * * the WnR bit is never set (the caller must do this). + * * for MPU based systems we don't bother to return a full FSR format + * value. + * + * @env: CPUARMState + * @address: virtual address to get physical address for + * @access_type: 0 for read, 1 for write, 2 for execute + * @is_user: 0 for privileged access, 1 for user + * @phys_ptr: set to the physical address corresponding to the virtual address + * @prot: set to the permissions for the page containing phys_ptr + * @page_size: set to the size of the page containing phys_ptr + */ static inline int get_phys_addr(CPUARMState *env, uint32_t address, int access_type, int is_user, target_phys_addr_t *phys_ptr, int *prot, |