diff options
Diffstat (limited to 'arch/unicore32/boot/compressed/head.S')
| -rw-r--r-- | arch/unicore32/boot/compressed/head.S | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/arch/unicore32/boot/compressed/head.S b/arch/unicore32/boot/compressed/head.S deleted file mode 100644 index 5f72662cd294..000000000000 --- a/arch/unicore32/boot/compressed/head.S +++ /dev/null @@ -1,201 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * linux/arch/unicore32/boot/compressed/head.S - * - * Code specific to PKUnity SoC and UniCore ISA - * - * Copyright (C) 2001-2010 GUAN Xue-tao - */ -#include <linux/linkage.h> -#include <mach/memory.h> - -#define csub cmpsub -#define cand cmpand -#define nop8 nop; nop; nop; nop; nop; nop; nop; nop - - .section ".start", #alloc, #execinstr - .text -start: - .type start,#function - - /* Initialize ASR, PRIV mode and INTR off */ - mov r0, #0xD3 - mov.a asr, r0 - - adr r0, LC0 - ldm (r1, r2, r3, r5, r6, r7, r8), [r0]+ - ldw sp, [r0+], #28 - sub.a r0, r0, r1 @ calculate the delta offset - - /* - * if delta is zero, we are running at the address - * we were linked at. - */ - beq not_relocated - - /* - * We're running at a different address. We need to fix - * up various pointers: - * r5 - zImage base address (_start) - * r7 - GOT start - * r8 - GOT end - */ - add r5, r5, r0 - add r7, r7, r0 - add r8, r8, r0 - - /* - * we need to fix up pointers into the BSS region. - * r2 - BSS start - * r3 - BSS end - * sp - stack pointer - */ - add r2, r2, r0 - add r3, r3, r0 - add sp, sp, r0 - - /* - * Relocate all entries in the GOT table. - * This fixes up the C references. - * r7 - GOT start - * r8 - GOT end - */ -1001: ldw r1, [r7+], #0 - add r1, r1, r0 - stw.w r1, [r7]+, #4 - csub.a r7, r8 - bub 1001b - -not_relocated: - /* - * Clear BSS region. - * r2 - BSS start - * r3 - BSS end - */ - mov r0, #0 -1002: stw.w r0, [r2]+, #4 - csub.a r2, r3 - bub 1002b - - /* - * Turn on the cache. - */ - mov r0, #0 - movc p0.c5, r0, #28 @ cache invalidate all - nop8 - movc p0.c6, r0, #6 @ tlb invalidate all - nop8 - - mov r0, #0x1c @ en icache and wb dcache - movc p0.c1, r0, #0 - nop8 - - /* - * Set up some pointers, for starting decompressing. - */ - - mov r1, sp @ malloc space above stack - add r2, sp, #0x10000 @ 64k max - - /* - * Check to see if we will overwrite ourselves. - * r4 = final kernel address - * r5 = start of this image - * r6 = size of decompressed image - * r2 = end of malloc space (and therefore this image) - * We basically want: - * r4 >= r2 -> OK - * r4 + image length <= r5 -> OK - */ - ldw r4, =KERNEL_IMAGE_START - csub.a r4, r2 - bea wont_overwrite - add r0, r4, r6 - csub.a r0, r5 - beb wont_overwrite - - /* - * If overwrite, just print error message - */ - b __error_overwrite - - /* - * We're not in danger of overwriting ourselves. - * Do this the simple way. - */ -wont_overwrite: - /* - * decompress_kernel: - * r0: output_start - * r1: free_mem_ptr_p - * r2: free_mem_ptr_end_p - */ - mov r0, r4 - b.l decompress_kernel @ C functions - - /* - * Clean and flush the cache to maintain consistency. - */ - mov r0, #0 - movc p0.c5, r0, #14 @ flush dcache - nop8 - movc p0.c5, r0, #20 @ icache invalidate all - nop8 - - /* - * Turn off the Cache and MMU. - */ - mov r0, #0 @ disable i/d cache and MMU - movc p0.c1, r0, #0 - nop8 - - mov r0, #0 @ must be zero - ldw r4, =KERNEL_IMAGE_START - mov pc, r4 @ call kernel - - - .align 2 - .type LC0, #object -LC0: .word LC0 @ r1 - .word __bss_start @ r2 - .word _end @ r3 - .word _start @ r5 - .word _image_size @ r6 - .word _got_start @ r7 - .word _got_end @ r8 - .word decompress_stack_end @ sp - .size LC0, . - LC0 - -print_string: -#ifdef CONFIG_DEBUG_OCD -2001: ldb.w r1, [r0]+, #1 - csub.a r1, #0 - bne 2002f - mov pc, lr -2002: - movc r2, p1.c0, #0 - cand.a r2, #2 - bne 2002b - movc p1.c1, r1, #1 - csub.a r1, #'\n' - cmoveq r1, #'\r' - beq 2002b - b 2001b -#else - mov pc, lr -#endif - -__error_overwrite: - adr r0, str_error - b.l print_string -2001: nop8 - b 2001b -str_error: .asciz "\nError: Kernel address OVERWRITE\n" - .align - - .ltorg - - .align 4 - .section ".stack", "aw", %nobits -decompress_stack: .space 4096 -decompress_stack_end: |