diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/shared/start/start.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/shared/start/start.S | 50 |
1 files changed, 25 insertions, 25 deletions
diff --git a/c/src/lib/libbsp/powerpc/shared/start/start.S b/c/src/lib/libbsp/powerpc/shared/start/start.S index c986564cb7..8c90a442f0 100644 --- a/c/src/lib/libbsp/powerpc/shared/start/start.S +++ b/c/src/lib/libbsp/powerpc/shared/start/start.S @@ -28,20 +28,20 @@ li r10,0x63 ; \ sc - + .text .globl __rtems_entry_point .type __rtems_entry_point,@function __rtems_entry_point: #ifdef DEBUG_EARLY_START MONITOR_ENTER -#endif - -/* +#endif + +/* * PREP * This is jumped to on prep systems right after the kernel is relocated * to its proper place in memory by the boot loader. The expected layout - * of the regs is: + * of the regs is: * r3: ptr to residual data * r4: initrd_start or if no initrd then 0 * r5: initrd_end - unused if r4 is 0 @@ -51,7 +51,7 @@ __rtems_entry_point: * The Prep boot loader insure that the MMU is currently off... * */ - + mr r31,r3 /* save parameters */ mr r30,r4 mr r29,r5 @@ -64,7 +64,7 @@ __rtems_entry_point: bl flush_tlbs /* * Use the first pair of BAT registers to map the 1st 256MB - * of RAM to KERNELBASE. + * of RAM to KERNELBASE. */ lis r11,KERNELBASE@h ori r11,r11,0x1ffe /* set up BAT registers for 604 */ @@ -77,14 +77,14 @@ __rtems_entry_point: isync /* - * we now have the 1st 256M of ram mapped with the bats. We are still - * running on the bootloader stack and cannot switch to an RTEMS allocated + * we now have the 1st 256M of ram mapped with the bats. We are still + * running on the bootloader stack and cannot switch to an RTEMS allocated * init stack before copying the residual data that may have been set just after * rtems_end address. This bug has been experienced on MVME2304. Thank to - * Till Straumann <strauman@SLAC.Stanford.EDU> for hunting it and suggesting + * Till Straumann <strauman@SLAC.Stanford.EDU> for hunting it and suggesting * the appropriate code. */ - + enter_C_code: bl MMUon bl __eabi /* setup EABI and SYSV environment */ @@ -96,7 +96,7 @@ enter_C_code: mr r4,r30 mr r5,r29 mr r6,r28 - mr r7,r27 + mr r7,r27 bl save_boot_params /* * stack = &__rtems_end + 4096 @@ -113,10 +113,10 @@ enter_C_code: li r3, 0 /* argc */ bl boot_card bl _return_to_ppcbug - + .globl MMUon .type MMUon,@function -MMUon: +MMUon: mfmsr r0 #if (PPC_HAS_FPU == 0) ori r0,r0, MSR_IP | MSR_RI | MSR_IR | MSR_DR | MSR_EE | MSR_FE0 | MSR_FE1 | MSR_FP @@ -130,10 +130,10 @@ MMUon: mtsrr1 r0 SYNC rfi - + .globl MMUoff .type MMUoff,@function -MMUoff: +MMUoff: mfmsr r0 ori r0,r0,MSR_IR| MSR_DR | MSR_IP mflr r11 @@ -146,22 +146,22 @@ MMUoff: .globl _return_to_ppcbug .type _return_to_ppcbug,@function - + _return_to_ppcbug: mflr r30 bl MMUoff MONITOR_ENTER bl MMUon mtctr r30 - bctr + bctr -/* +/* * An undocumented "feature" of 604e requires that the v bit * be cleared before changing BAT values. * * Also, newer IBM firmware does not clear bat3 and 4 so * this makes sure it's done. - * -- Cort + * -- Cort */ clear_bats: li r20,0 @@ -171,14 +171,14 @@ clear_bats: SYNC beq 1f mtspr DBAT0U,r20 - mtspr DBAT0L,r20 + mtspr DBAT0L,r20 mtspr DBAT1U,r20 mtspr DBAT1L,r20 mtspr DBAT2U,r20 - mtspr DBAT2L,r20 + mtspr DBAT2L,r20 mtspr DBAT3U,r20 mtspr DBAT3L,r20 -1: +1: mtspr IBAT0U,r20 mtspr IBAT0L,r20 mtspr IBAT1U,r20 @@ -187,7 +187,7 @@ clear_bats: mtspr IBAT2L,r20 mtspr IBAT3U,r20 mtspr IBAT3L,r20 - SYNC + SYNC blr flush_tlbs: @@ -197,6 +197,6 @@ flush_tlbs: bgt 1b sync blr - + .comm environ,4,4 |