diff options
Diffstat (limited to 'target/unicore32/softmmu.c')
| -rw-r--r-- | target/unicore32/softmmu.c | 280 |
1 files changed, 0 insertions, 280 deletions
diff --git a/target/unicore32/softmmu.c b/target/unicore32/softmmu.c deleted file mode 100644 index cbdaa500b7..0000000000 --- a/target/unicore32/softmmu.c +++ /dev/null @@ -1,280 +0,0 @@ -/* - * Softmmu related functions - * - * Copyright (C) 2010-2012 Guan Xuetao - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation, or any later version. - * See the COPYING file in the top-level directory. - */ -#ifdef CONFIG_USER_ONLY -#error This file only exist under softmmu circumstance -#endif - -#include "qemu/osdep.h" -#include "cpu.h" -#include "exec/exec-all.h" -#include "qemu/error-report.h" - -#undef DEBUG_UC32 - -#ifdef DEBUG_UC32 -#define DPRINTF(fmt, ...) printf("%s: " fmt , __func__, ## __VA_ARGS__) -#else -#define DPRINTF(fmt, ...) do {} while (0) -#endif - -#define SUPERPAGE_SIZE (1 << 22) -#define UC32_PAGETABLE_READ (1 << 8) -#define UC32_PAGETABLE_WRITE (1 << 7) -#define UC32_PAGETABLE_EXEC (1 << 6) -#define UC32_PAGETABLE_EXIST (1 << 2) -#define PAGETABLE_TYPE(x) ((x) & 3) - - -/* Map CPU modes onto saved register banks. */ -static inline int bank_number(CPUUniCore32State *env, int mode) -{ - switch (mode) { - case ASR_MODE_USER: - case ASR_MODE_SUSR: - return 0; - case ASR_MODE_PRIV: - return 1; - case ASR_MODE_TRAP: - return 2; - case ASR_MODE_EXTN: - return 3; - case ASR_MODE_INTR: - return 4; - } - cpu_abort(env_cpu(env), "Bad mode %x\n", mode); - return -1; -} - -void switch_mode(CPUUniCore32State *env, int mode) -{ - int old_mode; - int i; - - old_mode = env->uncached_asr & ASR_M; - if (mode == old_mode) { - return; - } - - i = bank_number(env, old_mode); - env->banked_r29[i] = env->regs[29]; - env->banked_r30[i] = env->regs[30]; - env->banked_bsr[i] = env->bsr; - - i = bank_number(env, mode); - env->regs[29] = env->banked_r29[i]; - env->regs[30] = env->banked_r30[i]; - env->bsr = env->banked_bsr[i]; -} - -/* Handle a CPU exception. */ -void uc32_cpu_do_interrupt(CPUState *cs) -{ - UniCore32CPU *cpu = UNICORE32_CPU(cs); - CPUUniCore32State *env = &cpu->env; - uint32_t addr; - int new_mode; - - switch (cs->exception_index) { - case UC32_EXCP_PRIV: - new_mode = ASR_MODE_PRIV; - addr = 0x08; - break; - case UC32_EXCP_ITRAP: - DPRINTF("itrap happened at %x\n", env->regs[31]); - new_mode = ASR_MODE_TRAP; - addr = 0x0c; - break; - case UC32_EXCP_DTRAP: - DPRINTF("dtrap happened at %x\n", env->regs[31]); - new_mode = ASR_MODE_TRAP; - addr = 0x10; - break; - case UC32_EXCP_INTR: - new_mode = ASR_MODE_INTR; - addr = 0x18; - break; - default: - cpu_abort(cs, "Unhandled exception 0x%x\n", cs->exception_index); - return; - } - /* High vectors. */ - if (env->cp0.c1_sys & (1 << 13)) { - addr += 0xffff0000; - } - - switch_mode(env, new_mode); - env->bsr = cpu_asr_read(env); - env->uncached_asr = (env->uncached_asr & ~ASR_M) | new_mode; - env->uncached_asr |= ASR_I; - /* The PC already points to the proper instruction. */ - env->regs[30] = env->regs[31]; - env->regs[31] = addr; - cs->interrupt_request |= CPU_INTERRUPT_EXITTB; -} - -static int get_phys_addr_ucv2(CPUUniCore32State *env, uint32_t address, - int access_type, int is_user, uint32_t *phys_ptr, int *prot, - target_ulong *page_size) -{ - CPUState *cs = env_cpu(env); - int code; - uint32_t table; - uint32_t desc; - uint32_t phys_addr; - - /* Pagetable walk. */ - /* Lookup l1 descriptor. */ - table = env->cp0.c2_base & 0xfffff000; - table |= (address >> 20) & 0xffc; - desc = ldl_phys(cs->as, table); - code = 0; - switch (PAGETABLE_TYPE(desc)) { - case 3: - /* Superpage */ - if (!(desc & UC32_PAGETABLE_EXIST)) { - code = 0x0b; /* superpage miss */ - goto do_fault; - } - phys_addr = (desc & 0xffc00000) | (address & 0x003fffff); - *page_size = SUPERPAGE_SIZE; - break; - case 0: - /* Lookup l2 entry. */ - if (is_user) { - DPRINTF("PGD address %x, desc %x\n", table, desc); - } - if (!(desc & UC32_PAGETABLE_EXIST)) { - code = 0x05; /* second pagetable miss */ - goto do_fault; - } - table = (desc & 0xfffff000) | ((address >> 10) & 0xffc); - desc = ldl_phys(cs->as, table); - /* 4k page. */ - if (is_user) { - DPRINTF("PTE address %x, desc %x\n", table, desc); - } - if (!(desc & UC32_PAGETABLE_EXIST)) { - code = 0x08; /* page miss */ - goto do_fault; - } - switch (PAGETABLE_TYPE(desc)) { - case 0: - phys_addr = (desc & 0xfffff000) | (address & 0xfff); - *page_size = TARGET_PAGE_SIZE; - break; - default: - cpu_abort(cs, "wrong page type!"); - } - break; - default: - cpu_abort(cs, "wrong page type!"); - } - - *phys_ptr = phys_addr; - *prot = 0; - /* Check access permissions. */ - if (desc & UC32_PAGETABLE_READ) { - *prot |= PAGE_READ; - } else { - if (is_user && (access_type == 0)) { - code = 0x11; /* access unreadable area */ - goto do_fault; - } - } - - if (desc & UC32_PAGETABLE_WRITE) { - *prot |= PAGE_WRITE; - } else { - if (is_user && (access_type == 1)) { - code = 0x12; /* access unwritable area */ - goto do_fault; - } - } - - if (desc & UC32_PAGETABLE_EXEC) { - *prot |= PAGE_EXEC; - } else { - if (is_user && (access_type == 2)) { - code = 0x13; /* access unexecutable area */ - goto do_fault; - } - } - -do_fault: - return code; -} - -bool uc32_cpu_tlb_fill(CPUState *cs, vaddr address, int size, - MMUAccessType access_type, int mmu_idx, - bool probe, uintptr_t retaddr) -{ - UniCore32CPU *cpu = UNICORE32_CPU(cs); - CPUUniCore32State *env = &cpu->env; - uint32_t phys_addr; - target_ulong page_size; - int prot; - int ret, is_user; - - ret = 1; - is_user = mmu_idx == MMU_USER_IDX; - - if ((env->cp0.c1_sys & 1) == 0) { - /* MMU disabled. */ - phys_addr = address; - prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; - page_size = TARGET_PAGE_SIZE; - ret = 0; - } else { - if ((address & (1 << 31)) || (is_user)) { - ret = get_phys_addr_ucv2(env, address, access_type, is_user, - &phys_addr, &prot, &page_size); - if (is_user) { - DPRINTF("user space access: ret %x, address %" VADDR_PRIx ", " - "access_type %x, phys_addr %x, prot %x\n", - ret, address, access_type, phys_addr, prot); - } - } else { - /*IO memory */ - phys_addr = address | (1 << 31); - prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; - page_size = TARGET_PAGE_SIZE; - ret = 0; - } - } - - if (ret == 0) { - /* Map a single page. */ - phys_addr &= TARGET_PAGE_MASK; - address &= TARGET_PAGE_MASK; - tlb_set_page(cs, address, phys_addr, prot, mmu_idx, page_size); - return true; - } - - if (probe) { - return false; - } - - env->cp0.c3_faultstatus = ret; - env->cp0.c4_faultaddr = address; - if (access_type == 2) { - cs->exception_index = UC32_EXCP_ITRAP; - } else { - cs->exception_index = UC32_EXCP_DTRAP; - } - cpu_loop_exit_restore(cs, retaddr); -} - -hwaddr uc32_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) -{ - error_report("function uc32_cpu_get_phys_page_debug not " - "implemented, aborting"); - return -1; -} |