Revision 9fb63ac2 target-mips/helper.c
| b/target-mips/helper.c | ||
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include "exec.h" |
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/* MIPS32 4K MMU emulation */ |
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#if MIPS_USES_4K_TLB
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#ifdef MIPS_USES_R4K_TLB
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static int map_address (CPUState *env, target_ulong *physical, int *prot, |
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target_ulong address, int rw, int access_type) |
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{
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| ... | ... | |
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/* Check access rights */ |
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if ((tlb->V[n] & 2) && (rw == 0 || (tlb->D[n] & 4))) {
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*physical = tlb->PFN[n] | (address & 0xFFF); |
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*prot = PROT_READ;
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*prot = PAGE_READ;
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if (tlb->D[n]) |
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*prot |= PROT_WRITE;
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*prot |= PAGE_WRITE;
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return 0; |
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} else if (!(tlb->V[n] & 2)) {
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return -3; |
| ... | ... | |
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return -1; |
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ret = 0; |
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if (address < 0x80000000UL) {
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if (user_mode || !(env->hflags & MIPS_HFLAG_ERL)) {
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#if MIPS_USES_4K_TLB
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ret = map_address(env, physical, prot, address, rw); |
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if (!(env->hflags & MIPS_HFLAG_ERL)) {
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#ifdef MIPS_USES_R4K_TLB
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ret = map_address(env, physical, prot, address, rw, access_type);
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#else |
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*physical = address + 0x40000000UL; |
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*prot = PAGE_READ | PAGE_WRITE; |
| ... | ... | |
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*prot = PAGE_READ | PAGE_WRITE; |
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} else if (address < 0xE0000000UL) {
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/* kseg2 */ |
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#if MIPS_USES_4K_TLB
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ret = map_address(env, physical, prot, address, rw); |
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#ifdef MIPS_USES_R4K_TLB
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ret = map_address(env, physical, prot, address, rw, access_type);
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#else |
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*physical = address; |
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*prot = PAGE_READ | PAGE_WRITE; |
| ... | ... | |
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/* kseg3 */ |
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/* XXX: check supervisor mode */ |
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/* XXX: debug segment is not emulated */ |
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#if MIPS_USES_4K_TLB
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ret = map_address(env, physical, prot, address, rw); |
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#ifdef MIPS_USES_R4K_TLB
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ret = map_address(env, physical, prot, address, rw, access_type);
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#else |
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*physical = address; |
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*prot = PAGE_READ | PAGE_WRITE; |
| ... | ... | |
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pc = 0xBFC00480; |
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break; |
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case EXCP_RESET: |
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#if defined (MIPS_USES_R4K_TLB)
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#ifdef MIPS_USES_R4K_TLB
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env->CP0_random = MIPS_TLB_NB - 1; |
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#endif |
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env->CP0_Wired = 0; |
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