diff options
Diffstat (limited to 'arch/arm/mach-pxa/mioa701_bootresume.S')
| -rw-r--r-- | arch/arm/mach-pxa/mioa701_bootresume.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/mioa701_bootresume.S b/arch/arm/mach-pxa/mioa701_bootresume.S new file mode 100644 index 000000000..4ad2fa27f --- /dev/null +++ b/arch/arm/mach-pxa/mioa701_bootresume.S @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* Bootloader to resume MIO A701 + * + * 2007-1-12 Robert Jarzmik +*/ + +#include <linux/linkage.h> +#include <asm/assembler.h> + +/* + * Note: Yes, part of the following code is located into the .data section. + * This is to allow jumpaddr to be accessed with a relative load + * while we can't rely on any MMU translation. We could have put + * sleep_save_sp in the .text section as well, but some setups might + * insist on it to be truly read-only. + */ + .data + .align 2 +ENTRY(mioa701_bootstrap) +0: + b 1f +ENTRY(mioa701_jumpaddr) + .word 0x40f00008 @ PSPR in no-MMU mode +1: + mov r0, #0xa0000000 @ Don't suppose memory access works + orr r0, r0, #0x00200000 @ even if it's supposed to + orr r0, r0, #0x0000b000 + mov r1, #0 + str r1, [r0] @ Early disable resume for next boot + ldr r0, mioa701_jumpaddr @ (Murphy's Law) + ldr r0, [r0] + ret r0 +2: + +ENTRY(mioa701_bootstrap_lg) + .data + .align 2 + .word 2b-0b |