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.bhus...@freescale.com> --- v1-->v2 - Dynemic seting of initial map size in gpr[7] - For this the tlb size calculation is moved into a function. hw/ppc/e500.c | 29 ++++++++++++++++++++++++++--- 1 files changed, 26 insertions(+), 3 deletions(-) diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c index c1bdb6b..decd86c 100644 --- a/hw/ppc/e500.c +++ b/hw/ppc/e500.c @@ -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 +408,23 @@ 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 +461,12 @@ 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); } -- 1.7.0.4