gwj / at91sam9263 · Commits

Commit b8a9e8f1336492798107a8704c22c4e8053c3dd7

Authored by bellard
1 parent 4955a2cd

initial user mmu support 


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1270 c046a42c-6fe2-441c-8c8c-71466251a162
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Showing 3 changed files with 31 additions and 2 deletions
target-arm/cpu.h
  View file @b8a9e8f
... ... @@ -24,8 +24,10 @@
24 24  
25 25 #include "cpu-defs.h"
26 26  
27   -#define EXCP_UDEF 1 /* undefined instruction */
28   -#define EXCP_SWI 2 /* software interrupt */
  27 +#define EXCP_UDEF 1 /* undefined instruction */
  28 +#define EXCP_SWI 2 /* software interrupt */
  29 +#define EXCP_PREFETCH_ABORT 3
  30 +#define EXCP_DATA_ABORT 4
29 31  
30 32 typedef struct CPUARMState {
31 33 uint32_t regs[16];
... ... @@ -39,6 +41,9 @@ typedef struct CPUARMState {
39 41  
40 42 int thumb; /* 0 = arm mode, 1 = thumb mode */
41 43  
  44 + /* coprocessor 15 (MMU) status */
  45 + uint32_t cp15_6;
  46 +
42 47 /* exception/interrupt handling */
43 48 jmp_buf jmp_env;
44 49 int exception_index;
... ...
target-arm/exec.h
  View file @b8a9e8f
... ... @@ -48,3 +48,6 @@ static inline void env_to_regs(void)
48 48 static inline void regs_to_env(void)
49 49 {
50 50 }
  51 +
  52 +int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
  53 + int is_user, int is_softmmu);
... ...
target-arm/translate.c
  View file @b8a9e8f
... ... @@ -424,6 +424,7 @@ static void disas_arm_insn(DisasContext *s)
424 424 gen_op_movl_T0_psr();
425 425 gen_movl_reg_T0(s, rd);
426 426 }
  427 + break;
427 428 case 0x1:
428 429 if (op1 == 1) {
429 430 /* branch/exchange thumb (bx). */
... ... @@ -1576,3 +1577,23 @@ target_ulong cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
1576 1577 {
1577 1578 return addr;
1578 1579 }
  1580 +
  1581 +#if defined(CONFIG_USER_ONLY)
  1582 +
  1583 +int cpu_arm_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
  1584 + int is_user, int is_softmmu)
  1585 +{
  1586 + env->cp15_6 = address;
  1587 + if (rw == 2) {
  1588 + env->exception_index = EXCP_PREFETCH_ABORT;
  1589 + } else {
  1590 + env->exception_index = EXCP_DATA_ABORT;
  1591 + }
  1592 + return 1;
  1593 +}
  1594 +
  1595 +#else
  1596 +
  1597 +#error not implemented
  1598 +
  1599 +#endif
... ...