diff options
Diffstat (limited to 'arch/ppc/platforms/gemini_prom.S')
| -rw-r--r-- | arch/ppc/platforms/gemini_prom.S | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/arch/ppc/platforms/gemini_prom.S b/arch/ppc/platforms/gemini_prom.S deleted file mode 100644 index e8c84d24f01..00000000000 --- a/arch/ppc/platforms/gemini_prom.S +++ /dev/null @@ -1,90 +0,0 @@ -/* - * Not really prom support code (yet), but sort of anti-prom code. The current - * bootloader does a number of things it shouldn't and doesn't do things that it - * should. The stuff in here is mainly a hodge-podge collection of setup code - * to get the board up and running. - * ---Dan - */ - -#include <asm/reg.h> -#include <asm/page.h> -#include <platforms/gemini.h> -#include <asm/ppc_asm.h> - -/* - * On 750's the MMU is on when Linux is booted, so we need to clear out the - * bootloader's BAT settings, make sure we're in supervisor state (gotcha!), - * and turn off the MMU. - * - */ - -_GLOBAL(gemini_prom_init) -#ifdef CONFIG_SMP - /* Since the MMU's on, get stuff in rom space that we'll need */ - lis r4,GEMINI_CPUSTAT@h - ori r4,r4,GEMINI_CPUSTAT@l - lbz r5,0(r4) - andi. r5,r5,3 - mr r24,r5 /* cpu # used later on */ -#endif - mfmsr r4 - li r3,MSR_PR /* ensure supervisor! */ - ori r3,r3,MSR_IR|MSR_DR - andc r4,r4,r3 - mtmsr r4 - isync -#if 0 - /* zero out the bats now that the MMU is off */ -prom_no_mmu: - li r3,0 - mtspr SPRN_IBAT0U,r3 - mtspr SPRN_IBAT0L,r3 - mtspr SPRN_IBAT1U,r3 - mtspr SPRN_IBAT1L,r3 - mtspr SPRN_IBAT2U,r3 - mtspr SPRN_IBAT2L,r3 - mtspr SPRN_IBAT3U,r3 - mtspr SPRN_IBAT3L,r3 - - mtspr SPRN_DBAT0U,r3 - mtspr SPRN_DBAT0L,r3 - mtspr SPRN_DBAT1U,r3 - mtspr SPRN_DBAT1L,r3 - mtspr SPRN_DBAT2U,r3 - mtspr SPRN_DBAT2L,r3 - mtspr SPRN_DBAT3U,r3 - mtspr SPRN_DBAT3L,r3 -#endif - - /* the bootloader (as far as I'm currently aware) doesn't mess with page - tables, but since we're already here, might as well zap these, too */ - li r4,0 - mtspr SPRN_SDR1,r4 - - li r4,16 - mtctr r4 - li r3,0 - li r4,0 -3: mtsrin r3,r4 - addi r3,r3,1 - bdnz 3b - -#ifdef CONFIG_SMP - /* The 750 book (and Mot/IBM support) says that this will "assist" snooping - when in SMP. Not sure yet whether this should stay or leave... */ - mfspr r4,SPRN_HID0 - ori r4,r4,HID0_ABE - mtspr SPRN_HID0,r4 - sync -#endif /* CONFIG_SMP */ - blr - -/* apparently, SMon doesn't pay attention to HID0[SRST]. Disable the MMU and - branch to 0xfff00100 */ -_GLOBAL(_gemini_reboot) - lis r5,GEMINI_BOOT_INIT@h - ori r5,r5,GEMINI_BOOT_INIT@l - li r6,MSR_IP - mtspr SPRN_SRR0,r5 - mtspr SPRN_SRR1,r6 - rfi |