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target-tricore: Add softmmu support 

Add basic softmmu support for TriCore

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-id: 1409572800-4116-4-git-send-email-kbastian@mail.uni-paderborn.de
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Bastian Koppelmann 2014-09-01 12:59:48 +01:00 committed by Peter Maydell
parent e2d0501103
commit 2d30267e8e
2 changed files with 85 additions and 2 deletions
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54
target-tricore/helper.c
View File

@ -24,10 +24,62 @@
#include "cpu.h"
enum {
TLBRET_DIRTY = -4,
TLBRET_INVALID = -3,
TLBRET_NOMATCH = -2,
TLBRET_BADADDR = -1,
TLBRET_MATCH = 0
};
#if defined(CONFIG_SOFTMMU)
static int get_physical_address(CPUTriCoreState *env, hwaddr *physical,
int *prot, target_ulong address,
int rw, int access_type)
{
int ret = TLBRET_MATCH;
*physical = address & 0xFFFFFFFF;
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
return ret;
}
#endif
/* TODO: Add exeption support*/
static void raise_mmu_exception(CPUTriCoreState *env, target_ulong address,
int rw, int tlb_error)
{
}
int cpu_tricore_handle_mmu_fault(CPUState *cs, target_ulong address,
int rw, int mmu_idx)
{
return 0;
TriCoreCPU *cpu = TRICORE_CPU(cs);
CPUTriCoreState *env = &cpu->env;
hwaddr physical;
int prot;
int access_type;
int ret = 0;
rw &= 1;
access_type = ACCESS_INT;
ret = get_physical_address(env, &physical, &prot,
address, rw, access_type);
qemu_log("%s address=" TARGET_FMT_lx " ret %d physical " TARGET_FMT_plx
" prot %d\n", __func__, address, ret, physical, prot);
if (ret == TLBRET_MATCH) {
tlb_set_page(cs, address & TARGET_PAGE_MASK,
physical & TARGET_PAGE_MASK, prot | PAGE_EXEC,
mmu_idx, TARGET_PAGE_SIZE);
ret = 0;
} else if (ret < 0) {
raise_mmu_exception(env, address, rw, ret);
ret = 1;
}
return ret;
}
void tricore_cpu_do_interrupt(CPUState *cs)

33
target-tricore/op_helper.c
View File

@ -20,8 +20,39 @@
#include "exec/helper-proto.h"
#include "exec/cpu_ldst.h"
static inline void QEMU_NORETURN do_raise_exception_err(CPUTriCoreState *env,
uint32_t exception,
int error_code,
uintptr_t pc)
{
CPUState *cs = CPU(tricore_env_get_cpu(env));
cs->exception_index = exception;
env->error_code = error_code;
if (pc) {
/* now we have a real cpu fault */
cpu_restore_state(cs, pc);
}
cpu_loop_exit(cs);
}
static inline void QEMU_NORETURN do_raise_exception(CPUTriCoreState *env,
uint32_t exception,
uintptr_t pc)
{
do_raise_exception_err(env, exception, 0, pc);
}
void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx,
uintptr_t retaddr)
{
int ret;
ret = cpu_tricore_handle_mmu_fault(cs, addr, is_write, mmu_idx);
if (ret) {
TriCoreCPU *cpu = TRICORE_CPU(cs);
CPUTriCoreState *env = &cpu->env;
do_raise_exception_err(env, cs->exception_index,
env->error_code, retaddr);
}
}