1/* 2 * relocate_kernel.S - put the kernel image in place to boot 3 */ 4 5#include <asm/kexec.h> 6 7 .globl relocate_new_kernel 8relocate_new_kernel: 9 10 ldr r0,kexec_indirection_page 11 ldr r1,kexec_start_address 12 13 /* 14 * If there is no indirection page (we are doing crashdumps) 15 * skip any relocation. 16 */ 17 cmp r0, #0 18 beq 2f 19 200: /* top, read another word for the indirection page */ 21 ldr r3, [r0],#4 22 23 /* Is it a destination page. Put destination address to r4 */ 24 tst r3,#1,0 25 beq 1f 26 bic r4,r3,#1 27 b 0b 281: 29 /* Is it an indirection page */ 30 tst r3,#2,0 31 beq 1f 32 bic r0,r3,#2 33 b 0b 341: 35 36 /* are we done ? */ 37 tst r3,#4,0 38 beq 1f 39 b 2f 40 411: 42 /* is it source ? */ 43 tst r3,#8,0 44 beq 0b 45 bic r3,r3,#8 46 mov r6,#1024 479: 48 ldr r5,[r3],#4 49 str r5,[r4],#4 50 subs r6,r6,#1 51 bne 9b 52 b 0b 53 542: 55 /* Jump to relocated kernel */ 56 mov lr,r1 57 mov r0,#0 58 ldr r1,kexec_mach_type 59 ldr r2,kexec_boot_atags 60 mov pc,lr 61 62 .globl kexec_start_address 63kexec_start_address: 64 .long 0x0 65 66 .globl kexec_indirection_page 67kexec_indirection_page: 68 .long 0x0 69 70 .globl kexec_mach_type 71kexec_mach_type: 72 .long 0x0 73 74 /* phy addr of the atags for the new kernel */ 75 .globl kexec_boot_atags 76kexec_boot_atags: 77 .long 0x0 78 79relocate_new_kernel_end: 80 81 .globl relocate_new_kernel_size 82relocate_new_kernel_size: 83 .long relocate_new_kernel_end - relocate_new_kernel 84