summaryrefslogtreecommitdiff
path: root/arch/arm/boot/compressed/head-shark.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/boot/compressed/head-shark.S')
-rw-r--r--arch/arm/boot/compressed/head-shark.S140
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 92b56897ed64..000000000000
--- 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