CPU boot mode

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3231 c046a42c-6fe2-441c-8c8c-71466251a162

CPU boot mode
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3231 c046a42c-6fe2-441c-8c8c-71466251a162
blueswir1
1 parent 9437454a
Showing 6 changed files with 21 additions and 10 deletions
cpu-exec.c
hw/sun4m.c
target-sparc/cpu.h
target-sparc/helper.c
target-sparc/op_helper.c
target-sparc/translate.c
@@ -181,8 +181,9 @@ static inline TranslationBlock *tb_find_fast(void)
     flags = (((env->pstate & PS_PEF) >> 1) | ((env->fprs & FPRS_FEF) << 2))
         | (env->pstate & PS_PRIV) | ((env->lsu & (DMMU_E | IMMU_E)) >> 2);
 #else
-    // FPU enable . MMU enabled . MMU no-fault . Supervisor
-    flags = (env->psref << 3) | ((env->mmuregs[0] & (MMU_E | MMU_NF)) << 1)
+    // FPU enable . MMU Boot . MMU enabled . MMU no-fault . Supervisor
+    flags = (env->psref << 4) | (((env->mmuregs[0] & MMU_BM) >> 14) << 3)
+        | ((env->mmuregs[0] & (MMU_E | MMU_NF)) << 1)
         | env->psrs;
 #endif
     cs_base = env->npc;
@@ -50,7 +50,8 @@
 #define CMDLINE_ADDR         0x007ff000
 #define INITRD_LOAD_ADDR     0x00800000
 #define PROM_SIZE_MAX        (256 * 1024)
-#define PROM_ADDR	     0xffd00000
+#define PROM_PADDR           0xff0000000ULL
+#define PROM_VADDR           0xffd00000
 #define PROM_FILENAME	     "openbios-sparc32"
 #define MAX_CPUS 16
@@ -425,12 +426,12 @@ static void sun4m_load_kernel(long vram_size, int RAM_size, int boot_device,
     linux_boot = (kernel_filename != NULL);
     prom_offset = RAM_size + vram_size;
-    cpu_register_physical_memory(PROM_ADDR,
+    cpu_register_physical_memory(PROM_PADDR,
                                  (PROM_SIZE_MAX + TARGET_PAGE_SIZE - 1) & TARGET_PAGE_MASK,
                                  prom_offset | IO_MEM_ROM);
     snprintf(buf, sizeof(buf), "%s/%s", bios_dir, PROM_FILENAME);
-    ret = load_elf(buf, 0, NULL, NULL, NULL);
+    ret = load_elf(buf, PROM_PADDR - PROM_VADDR, NULL, NULL, NULL);
     if (ret < 0) {
 	fprintf(stderr, "qemu: could not load prom '%s'\n",
 		buf);
@@ -588,7 +589,7 @@ static void ss10_init(int RAM_size, int vga_ram_size, int boot_device,
         cpu_model = "TI SuperSparc II";
     sun4m_common_init(RAM_size, boot_device, ds, kernel_filename,
                       kernel_cmdline, initrd_filename, cpu_model,
-                      1, PROM_ADDR); // XXX prom overlap, actually first 4GB ok
+                      1, 0xffffffff); // XXX actually first 62GB ok
 }
 QEMUMachine ss5_machine = {
@@ -145,6 +145,7 @@
 /* MMU */
 #define MMU_E     (1<<0)
 #define MMU_NF    (1<<1)
+#define MMU_BM    (1<<14)
 #define PTE_ENTRYTYPE_MASK 3
 #define PTE_ACCESS_MASK    0x1c
@@ -110,7 +110,14 @@ int get_physical_address (CPUState *env, target_phys_addr_t *physical, int *prot
     unsigned long page_offset;
     virt_addr = address & TARGET_PAGE_MASK;
+
     if ((env->mmuregs[0] & MMU_E) == 0) { /* MMU disabled */
+        // Boot mode: instruction fetches are taken from PROM
+        if (rw == 2 && (env->mmuregs[0] & MMU_BM)) {
+            *physical = 0xff0000000ULL | (address & 0x3ffffULL);
+            *prot = PAGE_READ | PAGE_EXEC;
+            return 0;
+        }
         *physical = address;
         *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
         return 0;
@@ -337,8 +337,8 @@ void helper_st_asi(int asi, int size)
             oldreg = env->mmuregs[reg];
             switch(reg) {
             case 0:
-                env->mmuregs[reg] &= ~(MMU_E | MMU_NF);
-                env->mmuregs[reg] |= T1 & (MMU_E | MMU_NF);
+                env->mmuregs[reg] &= ~(MMU_E | MMU_NF | MMU_BM);
+                env->mmuregs[reg] |= T1 & (MMU_E | MMU_NF | MMU_BM);
                 // Mappings generated during no-fault mode or MMU
                 // disabled mode are invalid in normal mode
                 if (oldreg != env->mmuregs[reg])
@@ -3486,8 +3486,9 @@ void cpu_reset(CPUSPARCState *env)
     env->pstate = PS_PRIV;
     env->pc = 0x1fff0000000ULL;
 #else
-    env->pc = 0xffd00000;
+    env->pc = 0;
     env->mmuregs[0] &= ~(MMU_E | MMU_NF);
+    env->mmuregs[0] |= MMU_BM;
 #endif
     env->npc = env->pc + 4;
 #endif
@@ -3584,7 +3585,7 @@ int cpu_sparc_register (CPUSPARCState *env, const sparc_def_t *def)
     env->version = def->iu_version;
     env->fsr = def->fpu_version;
 #if !defined(TARGET_SPARC64)
-    env->mmuregs[0] = def->mmu_version;
+    env->mmuregs[0] |= def->mmu_version;
 #endif
     return 0;
 }