diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/motorola_powerpc/start/start.S')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/motorola_powerpc/start/start.S | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/c/src/lib/libbsp/powerpc/motorola_powerpc/start/start.S b/c/src/lib/libbsp/powerpc/motorola_powerpc/start/start.S deleted file mode 100644 index cc2dabd2c7..0000000000 --- a/c/src/lib/libbsp/powerpc/motorola_powerpc/start/start.S +++ /dev/null @@ -1,131 +0,0 @@ -/* - * start.S : RTEMS entry point - * - * Copyright (C) 1999 Eric Valette. valette@crf.canon.fr - * - * The license and distribution terms for this file may be - * found in found in the file LICENSE in this distribution or at - * http://www.OARcorp.com/rtems/license.html. - * - * $Id$ - * - */ - -#include <libcpu/cpu.h> -#include <libcpu/io.h> -#include <rtems/score/targopts.h> -#include <rtems/score/cpu.h> -#include "asm.h" - -#define SYNC \ - sync; \ - isync - -#define KERNELBASE 0x0 - -#define MONITOR_ENTER \ - mfmsr r10 ; \ - ori r10,r10,MSR_IP ; \ - mtmsr r10 ; \ - li r10,0x63 ; \ - sc - - .text - .globl __rtems_entry_point - .type __rtems_entry_point,@function -__rtems_entry_point: -#ifdef DEBUG_EARLY_START - MONITOR_ENTER -#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: - * r3: ptr to residual data - * r4: initrd_start or if no initrd then 0 - * r5: initrd_end - unused if r4 is 0 - * r6: Start of command line string - * r7: End of command line string - * - */ - - mr r31,r3 /* save parameters */ - mr r30,r4 - mr r29,r5 - mr r28,r6 - mr r27,r7 -/* - * Use the first pair of BAT registers to map the 1st 64MB - * of RAM to KERNELBASE. - */ - lis r11,KERNELBASE@h - ori r11,r11,0x7fe /* set up BAT registers for 604 */ - li r8,2 /* R/W access */ - mtspr DBAT0L,r8 /* N.B. 6xx (not 601) have valid */ - mtspr DBAT0U,r11 /* bit in upper BAT register */ - mtspr IBAT0L,r8 - mtspr IBAT0U,r11 - isync - -/* - * we now have the 1st 64M of ram mapped with the bats. - */ - -enter_C_code: - bl MMUon - /* - * stack = &__rtems_end + 4096 - */ - addis r9,r0, __rtems_end+(4096-CPU_MINIMUM_STACK_FRAME_SIZE)@ha - addi r9,r9, __rtems_end+(4096-CPU_MINIMUM_STACK_FRAME_SIZE)@l - mr r1, r9 - bl zero_bss - /* - * restore prep boot params - */ - mr r3,r31 - mr r4,r30 - mr r5,r29 - mr r6,r28 - mr r7,r27 - bl save_boot_params - bl boot_card - bl _return_to_ppcbug - - .globl MMUon - .type MMUon,@function -MMUon: - mfmsr r0 - ori r0,r0, MSR_IP | MSR_RI | MSR_IR | MSR_DR | MSR_EE | MSR_FE0 | MSR_FE1 - xori r0, r0, MSR_EE | MSR_IP | MSR_FP - mflr r11 - mtsrr0 r11 - mtsrr1 r0 - SYNC - rfi - - .globl MMUoff - .type MMUoff,@function -MMUoff: - mfmsr r0 - ori r0,r0,MSR_IR| MSR_DR | MSR_IP - mflr r11 - xori r0,r0,MSR_IR|MSR_DR - mtsrr0 r11 - mtsrr1 r0 - SYNC - rfi - - .globl _return_to_ppcbug - .type _return_to_ppcbug,@function - - -_return_to_ppcbug: - mflr r30 - bl MMUoff - MONITOR_ENTER - bl MMUon - mtctr r30 - bctr |