static int get_phys_addr_mpu(CPUARMState *env, uint32_t address, int access_type, int is_user, hwaddr *phys_ptr, int *prot) { int n; uint32_t mask; uint32_t base; *phys_ptr = address; for (n = 7; n >= 0; n--) { base = env->cp15.c6_region[n]; if ((base & 1) == 0) continue; mask = 1 << ((base >> 1) & 0x1f); /* Keep this shift separate from the above to avoid an (undefined) << 32. */ mask = (mask << 1) - 1; if (((base ^ address) & ~mask) == 0) break; } if (n < 0) return 2; if (access_type == 2) { mask = env->cp15.c5_insn; } else { mask = env->cp15.c5_data; } mask = (mask >> (n * 4)) & 0xf; switch (mask) { case 0: return 1; case 1: if (is_user) return 1; *prot = PAGE_READ | PAGE_WRITE; break; case 2: *prot = PAGE_READ; if (!is_user) *prot |= PAGE_WRITE; break; case 3: *prot = PAGE_READ | PAGE_WRITE; break; case 5: if (is_user) return 1; *prot = PAGE_READ; break; case 6: *prot = PAGE_READ; break; default: /* Bad permission. */ return 1; } *prot |= PAGE_EXEC; return 0; }