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| author | grehan <grehan@FreeBSD.org> | 2011-06-28 06:26:03 +0000 |
|---|---|---|
| committer | grehan <grehan@FreeBSD.org> | 2011-06-28 06:26:03 +0000 |
| commit | 2c6741be0f59191f2283eb268e4f7690399d578a (patch) | |
| tree | b139c8c6dcca4fa284815daade405b75886ee360 /sys/powerpc/booke/machdep.c | |
| parent | 3c35264f695e0a1f8a04dbcca1c93bb5159b2274 (diff) | |
| parent | 19ae02bba572390c7299166228d31e54003e094a (diff) | |
| download | FreeBSD-src-2c6741be0f59191f2283eb268e4f7690399d578a.zip FreeBSD-src-2c6741be0f59191f2283eb268e4f7690399d578a.tar.gz | |
IFC @ r222830
Diffstat (limited to 'sys/powerpc/booke/machdep.c')
| -rw-r--r-- | sys/powerpc/booke/machdep.c | 53 |
1 files changed, 32 insertions, 21 deletions
diff --git a/sys/powerpc/booke/machdep.c b/sys/powerpc/booke/machdep.c index f2dbacf..c2b5e6f 100644 --- a/sys/powerpc/booke/machdep.c +++ b/sys/powerpc/booke/machdep.c @@ -190,7 +190,7 @@ SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_e500_startup, NULL); void print_kernel_section_addr(void); void print_kenv(void); -u_int e500_init(u_int32_t, u_int32_t, void *); +u_int booke_init(uint32_t, uint32_t); static void cpu_e500_startup(void *dummy) @@ -276,19 +276,41 @@ print_kernel_section_addr(void) } u_int -e500_init(u_int32_t startkernel, u_int32_t endkernel, void *mdp) +booke_init(uint32_t arg1, uint32_t arg2) { struct pcpu *pc; - void *kmdp; + void *kmdp, *mdp; vm_offset_t dtbp, end; uint32_t csr; kmdp = NULL; - end = endkernel; + end = (uintptr_t)_end; dtbp = (vm_offset_t)NULL; /* + * Handle the various ways we can get loaded and started: + * - FreeBSD's loader passes the pointer to the metadata + * in arg1, with arg2 undefined. arg1 has a value that's + * relative to the kernel's link address (i.e. larger + * than 0xc0000000). + * - Juniper's loader passes the metadata pointer in arg2 + * and sets arg1 to zero. This is to signal that the + * loader maps the kernel and starts it at its link + * address (unlike the FreeBSD loader). + * - U-Boot passes the standard argc and argv parameters + * in arg1 and arg2 (resp). arg1 is between 1 and some + * relatively small number, such as 64K. arg2 is the + * physical address of the argv vector. + */ + if (arg1 > (uintptr_t)kernel_text) /* FreeBSD loader */ + mdp = (void *)arg1; + else if (arg1 == 0) /* Juniper loader */ + mdp = (void *)arg2; + else /* U-Boot */ + mdp = NULL; + + /* * Parse metadata and fetch parameters. */ if (mdp != NULL) { @@ -309,17 +331,8 @@ e500_init(u_int32_t startkernel, u_int32_t endkernel, void *mdp) #endif } } else { - /* - * We should scream but how? Cannot even output anything... - */ - - /* - * FIXME add return value and handle in the locore so we can - * return to the loader maybe? (this seems not very easy to - * restore everything as the TLB have all been reprogrammed - * in the locore etc...) - */ - while (1); + bzero(__sbss_start, __sbss_end - __sbss_start); + bzero(__bss_start, _end - __bss_start); } #if defined(FDT_DTB_STATIC) @@ -368,9 +381,7 @@ e500_init(u_int32_t startkernel, u_int32_t endkernel, void *mdp) cninit(); /* Print out some debug info... */ - debugf("e500_init: console initialized\n"); - debugf(" arg1 startkernel = 0x%08x\n", startkernel); - debugf(" arg2 endkernel = 0x%08x\n", endkernel); + debugf("%s: console initialized\n", __func__); debugf(" arg3 mdp = 0x%08x\n", (u_int32_t)mdp); debugf(" end = 0x%08x\n", (u_int32_t)end); debugf(" boothowto = 0x%08x\n", boothowto); @@ -403,7 +414,7 @@ e500_init(u_int32_t startkernel, u_int32_t endkernel, void *mdp) /* Initialise virtual memory. */ pmap_mmu_install(MMU_TYPE_BOOKE, 0); - pmap_bootstrap(startkernel, end); + pmap_bootstrap((uintptr_t)kernel_text, end); debugf("MSR = 0x%08x\n", mfmsr()); //tlb1_print_entries(); //tlb1_print_tlbentries(); @@ -449,8 +460,8 @@ e500_init(u_int32_t startkernel, u_int32_t endkernel, void *mdp) printf("L1 I-cache %sabled\n", (csr & L1CSR1_ICE) ? "en" : "dis"); - debugf("e500_init: SP = 0x%08x\n", ((uintptr_t)thread0.td_pcb - 16) & ~15); - debugf("e500_init: e\n"); + debugf("%s: SP = 0x%08x\n", __func__, + ((uintptr_t)thread0.td_pcb - 16) & ~15); return (((uintptr_t)thread0.td_pcb - 16) & ~15); } |
