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PPC: mpc8544ds: Span initial TLB entry over as much RAM as we need

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The initial TLB entry is supposed to help us run the guest -kernel payload.
This means the guest needs to be able to access its own memory, the initrd
memory and the device tree.

So far we only statically reserved a TLB entry from [0;256M[. This patch
fixes it to span from [0;dt_end[, allowing the guest payload to access
everything initially.

Reported-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2012-05-19 00:48:50 +02:00
parent ea6c0dac4b
commit cba2026a41
1 changed files with 26 additions and 13 deletions
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39
hw/ppce500_mpc8544ds.c
View File

@ -31,6 +31,7 @@
#include "elf.h" #include "elf.h"
#include "sysbus.h" #include "sysbus.h"
#include "exec-memory.h" #include "exec-memory.h"
#include "host-utils.h"
#define BINARY_DEVICE_TREE_FILE "mpc8544ds.dtb" #define BINARY_DEVICE_TREE_FILE "mpc8544ds.dtb"
#define UIMAGE_LOAD_BASE 0 #define UIMAGE_LOAD_BASE 0
@ -55,6 +56,7 @@
struct boot_info struct boot_info
{ {
uint32_t dt_base; uint32_t dt_base;
uint32_t dt_size;
uint32_t entry; uint32_t entry;
}; };
@ -164,7 +166,11 @@ static int mpc8544_load_device_tree(CPUPPCState *env,
} }
ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr); ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
if (ret < 0) {
goto out;
}
g_free(fdt); g_free(fdt);
ret = fdt_size;
out: out:
#endif #endif
@ -172,23 +178,27 @@ out:
return ret; return ret;
} }
/* Create -kernel TLB entries for BookE, linearly spanning 256MB. */ /* Create -kernel TLB entries for BookE. */
static inline target_phys_addr_t booke206_page_size_to_tlb(uint64_t size) static inline target_phys_addr_t booke206_page_size_to_tlb(uint64_t size)
{ {
return ffs(size >> 10) - 1; return 63 - clz64(size >> 10);
} }
static void mmubooke_create_initial_mapping(CPUPPCState *env, static void mmubooke_create_initial_mapping(CPUPPCState *env)
target_ulong va,
target_phys_addr_t pa)
{ {
struct boot_info *bi = env->load_info;
ppcmas_tlb_t *tlb = booke206_get_tlbm(env, 1, 0, 0); ppcmas_tlb_t *tlb = booke206_get_tlbm(env, 1, 0, 0);
target_phys_addr_t size; target_phys_addr_t size, dt_end;
int ps;
size = (booke206_page_size_to_tlb(256 * 1024 * 1024) << MAS1_TSIZE_SHIFT); /* Our initial TLB entry needs to cover everything from 0 to
the device tree top */
dt_end = bi->dt_base + bi->dt_size;
ps = booke206_page_size_to_tlb(dt_end) + 1;
size = (ps << MAS1_TSIZE_SHIFT);
tlb->mas1 = MAS1_VALID | size; tlb->mas1 = MAS1_VALID | size;
tlb->mas2 = va & TARGET_PAGE_MASK; tlb->mas2 = 0;
tlb->mas7_3 = pa & TARGET_PAGE_MASK; tlb->mas7_3 = 0;
tlb->mas7_3 |= MAS3_UR | MAS3_UW | MAS3_UX | MAS3_SR | MAS3_SW | MAS3_SX; tlb->mas7_3 |= MAS3_UR | MAS3_UW | MAS3_UX | MAS3_SR | MAS3_SW | MAS3_SX;
env->tlb_dirty = true; env->tlb_dirty = true;
@ -220,7 +230,7 @@ static void mpc8544ds_cpu_reset(void *opaque)
env->gpr[1] = (16<<20) - 8; env->gpr[1] = (16<<20) - 8;
env->gpr[3] = bi->dt_base; env->gpr[3] = bi->dt_base;
env->nip = bi->entry; env->nip = bi->entry;
mmubooke_create_initial_mapping(env, 0, 0); mmubooke_create_initial_mapping(env);
} }
static void mpc8544ds_init(ram_addr_t ram_size, static void mpc8544ds_init(ram_addr_t ram_size,
@ -379,13 +389,15 @@ static void mpc8544ds_init(ram_addr_t ram_size,
/* If we're loading a kernel directly, we must load the device tree too. */ /* If we're loading a kernel directly, we must load the device tree too. */
if (kernel_filename) { if (kernel_filename) {
struct boot_info *boot_info; struct boot_info *boot_info;
int dt_size;
#ifndef CONFIG_FDT #ifndef CONFIG_FDT
cpu_abort(env, "Compiled without FDT support - can't load kernel\n"); cpu_abort(env, "Compiled without FDT support - can't load kernel\n");
#endif #endif
dt_base = (kernel_size + DTC_LOAD_PAD) & ~DTC_PAD_MASK; dt_base = (loadaddr + kernel_size + DTC_LOAD_PAD) & ~DTC_PAD_MASK;
if (mpc8544_load_device_tree(env, dt_base, ram_size, dt_size = mpc8544_load_device_tree(env, dt_base, ram_size, initrd_base,
initrd_base, initrd_size, kernel_cmdline) < 0) { initrd_size, kernel_cmdline);
if (dt_size < 0) {
fprintf(stderr, "couldn't load device tree\n"); fprintf(stderr, "couldn't load device tree\n");
exit(1); exit(1);
} }
@ -393,6 +405,7 @@ static void mpc8544ds_init(ram_addr_t ram_size,
boot_info = env->load_info; boot_info = env->load_info;
boot_info->entry = entry; boot_info->entry = entry;
boot_info->dt_base = dt_base; boot_info->dt_base = dt_base;
boot_info->dt_size = dt_size;
} }
if (kvm_enabled()) { if (kvm_enabled()) {