diff options
Diffstat (limited to 'qemu/target-lm32/helper.c')
| -rw-r--r-- | qemu/target-lm32/helper.c | 236 |
1 files changed, 0 insertions, 236 deletions
diff --git a/qemu/target-lm32/helper.c b/qemu/target-lm32/helper.c deleted file mode 100644 index 655248f81..000000000 --- a/qemu/target-lm32/helper.c +++ /dev/null @@ -1,236 +0,0 @@ -/* - * LatticeMico32 helper routines. - * - * Copyright (c) 2010-2014 Michael Walle <michael@walle.cc> - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, see <http://www.gnu.org/licenses/>. - */ - -#include "qemu/osdep.h" -#include "cpu.h" -#include "qemu/host-utils.h" -#include "sysemu/sysemu.h" -#include "exec/semihost.h" -#include "exec/log.h" - -int lm32_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw, - int mmu_idx) -{ - LM32CPU *cpu = LM32_CPU(cs); - CPULM32State *env = &cpu->env; - int prot; - - address &= TARGET_PAGE_MASK; - prot = PAGE_BITS; - if (env->flags & LM32_FLAG_IGNORE_MSB) { - tlb_set_page(cs, address, address & 0x7fffffff, prot, mmu_idx, - TARGET_PAGE_SIZE); - } else { - tlb_set_page(cs, address, address, prot, mmu_idx, TARGET_PAGE_SIZE); - } - - return 0; -} - -hwaddr lm32_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) -{ - LM32CPU *cpu = LM32_CPU(cs); - - addr &= TARGET_PAGE_MASK; - if (cpu->env.flags & LM32_FLAG_IGNORE_MSB) { - return addr & 0x7fffffff; - } else { - return addr; - } -} - -void lm32_breakpoint_insert(CPULM32State *env, int idx, target_ulong address) -{ - LM32CPU *cpu = lm32_env_get_cpu(env); - - cpu_breakpoint_insert(CPU(cpu), address, BP_CPU, - &env->cpu_breakpoint[idx]); -} - -void lm32_breakpoint_remove(CPULM32State *env, int idx) -{ - LM32CPU *cpu = lm32_env_get_cpu(env); - - if (!env->cpu_breakpoint[idx]) { - return; - } - - cpu_breakpoint_remove_by_ref(CPU(cpu), env->cpu_breakpoint[idx]); - env->cpu_breakpoint[idx] = NULL; -} - -void lm32_watchpoint_insert(CPULM32State *env, int idx, target_ulong address, - lm32_wp_t wp_type) -{ - LM32CPU *cpu = lm32_env_get_cpu(env); - int flags = 0; - - switch (wp_type) { - case LM32_WP_DISABLED: - /* nothing to do */ - break; - case LM32_WP_READ: - flags = BP_CPU | BP_STOP_BEFORE_ACCESS | BP_MEM_READ; - break; - case LM32_WP_WRITE: - flags = BP_CPU | BP_STOP_BEFORE_ACCESS | BP_MEM_WRITE; - break; - case LM32_WP_READ_WRITE: - flags = BP_CPU | BP_STOP_BEFORE_ACCESS | BP_MEM_ACCESS; - break; - } - - if (flags != 0) { - cpu_watchpoint_insert(CPU(cpu), address, 1, flags, - &env->cpu_watchpoint[idx]); - } -} - -void lm32_watchpoint_remove(CPULM32State *env, int idx) -{ - LM32CPU *cpu = lm32_env_get_cpu(env); - - if (!env->cpu_watchpoint[idx]) { - return; - } - - cpu_watchpoint_remove_by_ref(CPU(cpu), env->cpu_watchpoint[idx]); - env->cpu_watchpoint[idx] = NULL; -} - -static bool check_watchpoints(CPULM32State *env) -{ - LM32CPU *cpu = lm32_env_get_cpu(env); - int i; - - for (i = 0; i < cpu->num_watchpoints; i++) { - if (env->cpu_watchpoint[i] && - env->cpu_watchpoint[i]->flags & BP_WATCHPOINT_HIT) { - return true; - } - } - return false; -} - -void lm32_debug_excp_handler(CPUState *cs) -{ - LM32CPU *cpu = LM32_CPU(cs); - CPULM32State *env = &cpu->env; - CPUBreakpoint *bp; - - if (cs->watchpoint_hit) { - if (cs->watchpoint_hit->flags & BP_CPU) { - cs->watchpoint_hit = NULL; - if (check_watchpoints(env)) { - raise_exception(env, EXCP_WATCHPOINT); - } else { - cpu_resume_from_signal(cs, NULL); - } - } - } else { - QTAILQ_FOREACH(bp, &cs->breakpoints, entry) { - if (bp->pc == env->pc) { - if (bp->flags & BP_CPU) { - raise_exception(env, EXCP_BREAKPOINT); - } - break; - } - } - } -} - -void lm32_cpu_do_interrupt(CPUState *cs) -{ - LM32CPU *cpu = LM32_CPU(cs); - CPULM32State *env = &cpu->env; - - qemu_log_mask(CPU_LOG_INT, - "exception at pc=%x type=%x\n", env->pc, cs->exception_index); - - switch (cs->exception_index) { - case EXCP_SYSTEMCALL: - if (unlikely(semihosting_enabled())) { - /* do_semicall() returns true if call was handled. Otherwise - * do the normal exception handling. */ - if (lm32_cpu_do_semihosting(cs)) { - env->pc += 4; - break; - } - } - /* fall through */ - case EXCP_INSN_BUS_ERROR: - case EXCP_DATA_BUS_ERROR: - case EXCP_DIVIDE_BY_ZERO: - case EXCP_IRQ: - /* non-debug exceptions */ - env->regs[R_EA] = env->pc; - env->ie |= (env->ie & IE_IE) ? IE_EIE : 0; - env->ie &= ~IE_IE; - if (env->dc & DC_RE) { - env->pc = env->deba + (cs->exception_index * 32); - } else { - env->pc = env->eba + (cs->exception_index * 32); - } - log_cpu_state_mask(CPU_LOG_INT, cs, 0); - break; - case EXCP_BREAKPOINT: - case EXCP_WATCHPOINT: - /* debug exceptions */ - env->regs[R_BA] = env->pc; - env->ie |= (env->ie & IE_IE) ? IE_BIE : 0; - env->ie &= ~IE_IE; - env->pc = env->deba + (cs->exception_index * 32); - log_cpu_state_mask(CPU_LOG_INT, cs, 0); - break; - default: - cpu_abort(cs, "unhandled exception type=%d\n", - cs->exception_index); - break; - } -} - -bool lm32_cpu_exec_interrupt(CPUState *cs, int interrupt_request) -{ - LM32CPU *cpu = LM32_CPU(cs); - CPULM32State *env = &cpu->env; - - if ((interrupt_request & CPU_INTERRUPT_HARD) && (env->ie & IE_IE)) { - cs->exception_index = EXCP_IRQ; - lm32_cpu_do_interrupt(cs); - return true; - } - return false; -} - -LM32CPU *cpu_lm32_init(const char *cpu_model) -{ - return LM32_CPU(cpu_generic_init(TYPE_LM32_CPU, cpu_model)); -} - -/* Some soc ignores the MSB on the address bus. Thus creating a shadow memory - * area. As a general rule, 0x00000000-0x7fffffff is cached, whereas - * 0x80000000-0xffffffff is not cached and used to access IO devices. */ -void cpu_lm32_set_phys_msb_ignore(CPULM32State *env, int value) -{ - if (value) { - env->flags |= LM32_FLAG_IGNORE_MSB; - } else { - env->flags &= ~LM32_FLAG_IGNORE_MSB; - } -} |