diff options
Diffstat (limited to 'arch/arm/boot/compressed/head-shark.S')
| -rw-r--r-- | arch/arm/boot/compressed/head-shark.S | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/arch/arm/boot/compressed/head-shark.S b/arch/arm/boot/compressed/head-shark.S deleted file mode 100644 index 92b56897ed6..00000000000 --- a/arch/arm/boot/compressed/head-shark.S +++ /dev/null @@ -1,140 +0,0 @@ -/* The head-file for the Shark - * by Alexander Schulz - * - * Does the following: - * - get the memory layout from firmware. This can only be done as long as the mmu - * is still on. - * - switch the mmu off, so we have physical addresses - * - copy the kernel to 0x08508000. This is done to have a fixed address where the - * C-parts (misc.c) are executed. This address must be known at compile-time, - * but the load-address of the kernel depends on how much memory is installed. - * - Jump to this location. - * - Set r8 with 0, r7 with the architecture ID for head.S - */ - -#include <linux/linkage.h> - -#include <asm/assembler.h> - - .section ".start", "ax" - - .arch armv4 - b __beginning - -__ofw_data: .long 0 @ the number of memory blocks - .space 128 @ (startaddr,size) ... - .space 128 @ bootargs - .align - -__beginning: mov r4, r0 @ save the entry to the firmware - - mov r0, #0xC0 @ disable irq and fiq - mov r1, r0 - mrs r3, cpsr - bic r2, r3, r0 - eor r2, r2, r1 - msr cpsr_c, r2 - - mov r0, r4 @ get the Memory layout from firmware - adr r1, __ofw_data - add r2, r1, #4 - mov lr, pc - b ofw_init - mov r1, #0 - - adr r2, __mmu_off @ calculate physical address - sub r2, r2, #0xf0000000 @ openprom maps us at f000 virt, 0e50 phys - adr r0, __ofw_data - ldr r0, [r0, #4] - add r2, r2, r0 - add r2, r2, #0x00500000 - - mrc p15, 0, r3, c1, c0 - bic r3, r3, #0xC @ Write Buffer and DCache - bic r3, r3, #0x1000 @ ICache - mcr p15, 0, r3, c1, c0 @ disabled - - mov r0, #0 - mcr p15, 0, r0, c7, c7 @ flush I,D caches on v4 - mcr p15, 0, r0, c7, c10, 4 @ drain write buffer on v4 - mcr p15, 0, r0, c8, c7 @ flush I,D TLBs on v4 - - bic r3, r3, #0x1 @ MMU - mcr p15, 0, r3, c1, c0 @ disabled - - mov pc, r2 - -__copy_target: .long 0x08507FFC -__copy_end: .long 0x08607FFC - - .word _start - .word __bss_start - - .align -__temp_stack: .space 128 - -__mmu_off: - adr r0, __ofw_data @ read the 1. entry of the memory map - ldr r0, [r0, #4] - orr r0, r0, #0x00600000 - sub r0, r0, #4 - - ldr r1, __copy_end - ldr r3, __copy_target - -/* r0 = 0x0e600000 (current end of kernelcode) - * r3 = 0x08508000 (where it should begin) - * r1 = 0x08608000 (end of copying area, 1MB) - * The kernel is compressed, so 1 MB should be enough. - * copy the kernel to the beginning of physical memory - * We start from the highest address, so we can copy - * from 0x08500000 to 0x08508000 if we have only 8MB - */ - -/* As we get more 2.6-kernels it gets more and more - * uncomfortable to be bound to kernel images of 1MB only. - * So we add a loop here, to be able to copy some more. - * Alexander Schulz 2005-07-17 - */ - - mov r4, #3 @ How many megabytes to copy - - -__MoveCode: sub r4, r4, #1 - -__Copy: ldr r2, [r0], #-4 - str r2, [r1], #-4 - teq r1, r3 - bne __Copy - - /* The firmware maps us in blocks of 1 MB, the next block is - _below_ the last one. So our decrementing source pointer - ist right here, but the destination pointer must be increased - by 2 MB */ - add r1, r1, #0x00200000 - add r3, r3, #0x00100000 - - teq r4, #0 - bne __MoveCode - - - /* and jump to it */ - adr r2, __go_on @ where we want to jump - adr r0, __ofw_data @ read the 1. entry of the memory map - ldr r0, [r0, #4] - sub r2, r2, r0 @ we are mapped add 0e50 now, sub that (-0e00) - sub r2, r2, #0x00500000 @ -0050 - ldr r0, __copy_target @ and add 0850 8000 instead - add r0, r0, #4 - add r2, r2, r0 - mov pc, r2 @ and jump there - -__go_on: - adr sp, __temp_stack - add sp, sp, #128 - adr r0, __ofw_data - mov lr, pc - b create_params - - mov r8, #0 - mov r7, #15 |