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PPC: e500: initialize GPRs as per epapr

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ePAPR defines the initial values of cpu registers.
This patch initialize the GPRs as per ePAPR specification.

This resolves the issue of guest reboot/reset (guest hang on reboot).

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
[agraf: add whitespace line]
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Bharat Bhushan 2013-04-29 04:40:56 +00:00 committed by Alexander Graf
parent b55519a0f2
commit cefd3cdbdd
1 changed files with 27 additions and 3 deletions
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30
hw/ppc/e500.c
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@ -37,6 +37,7 @@
#include "qemu/host-utils.h"
#include "hw/pci-host/ppce500.h"
#define EPAPR_MAGIC (0x45504150)
#define BINARY_DEVICE_TREE_FILE "mpc8544ds.dtb"
#define UIMAGE_LOAD_BASE 0
#define DTC_LOAD_PAD 0x1800000
@ -393,11 +394,10 @@ static inline hwaddr booke206_page_size_to_tlb(uint64_t size)
return 63 - clz64(size >> 10);
}
static void mmubooke_create_initial_mapping(CPUPPCState *env)
static int booke206_initial_map_tsize(CPUPPCState *env)
{
struct boot_info *bi = env->load_info;
ppcmas_tlb_t *tlb = booke206_get_tlbm(env, 1, 0, 0);
hwaddr size, dt_end;
hwaddr dt_end;
int ps;
/* Our initial TLB entry needs to cover everything from 0 to
@ -408,6 +408,24 @@ static void mmubooke_create_initial_mapping(CPUPPCState *env)
/* e500v2 can only do even TLB size bits */
ps++;
}
return ps;
}
static uint64_t mmubooke_initial_mapsize(CPUPPCState *env)
{
int tsize;
tsize = booke206_initial_map_tsize(env);
return (1ULL << 10 << tsize);
}
static void mmubooke_create_initial_mapping(CPUPPCState *env)
{
ppcmas_tlb_t *tlb = booke206_get_tlbm(env, 1, 0, 0);
hwaddr size;
int ps;
ps = booke206_initial_map_tsize(env);
size = (ps << MAS1_TSIZE_SHIFT);
tlb->mas1 = MAS1_VALID | size;
tlb->mas2 = 0;
@ -444,6 +462,12 @@ static void ppce500_cpu_reset(void *opaque)
cs->halted = 0;
env->gpr[1] = (16<<20) - 8;
env->gpr[3] = bi->dt_base;
env->gpr[4] = 0;
env->gpr[5] = 0;
env->gpr[6] = EPAPR_MAGIC;
env->gpr[7] = mmubooke_initial_mapsize(env);
env->gpr[8] = 0;
env->gpr[9] = 0;
env->nip = bi->entry;
mmubooke_create_initial_mapping(env);
}