diff options
Diffstat (limited to 'target/linux/realtek/files/arch/rlx/kernel/relocate_kernel.S')
| -rw-r--r-- | target/linux/realtek/files/arch/rlx/kernel/relocate_kernel.S | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/target/linux/realtek/files/arch/rlx/kernel/relocate_kernel.S b/target/linux/realtek/files/arch/rlx/kernel/relocate_kernel.S new file mode 100644 index 000000000..9ba2755b0 --- /dev/null +++ b/target/linux/realtek/files/arch/rlx/kernel/relocate_kernel.S @@ -0,0 +1,82 @@ +/* + * relocate_kernel.S for kexec + * Created by <nschichan@corp.free.fr> on Thu Oct 12 17:49:57 2006 + * + * This source code is licensed under the GNU General Public License, + * Version 2. See the file COPYING for more details. + */ + +#include <asm/asm.h> +#include <asm/asmmacro.h> +#include <asm/regdef.h> +#include <asm/page.h> +#include <asm/rlxregs.h> +#include <asm/stackframe.h> +#include <asm/addrspace.h> + +LEAF(relocate_new_kernel) + PTR_L s0, kexec_indirection_page + PTR_L s1, kexec_start_address + +process_entry: + PTR_L s2, (s0) + PTR_ADD s0, s0, SZREG + + /* destination page */ + and s3, s2, 0x1 + beq s3, zero, 1f + and s4, s2, ~0x1 /* store destination addr in s4 */ + move a0, s4 + b process_entry + +1: + /* indirection page, update s0 */ + and s3, s2, 0x2 + beq s3, zero, 1f + and s0, s2, ~0x2 + b process_entry + +1: + /* done page */ + and s3, s2, 0x4 + beq s3, zero, 1f + b done +1: + /* source page */ + and s3, s2, 0x8 + beq s3, zero, process_entry + and s2, s2, ~0x8 + li s6, (1 << PAGE_SHIFT) / SZREG + +copy_word: + /* copy page word by word */ + REG_L s5, (s2) + REG_S s5, (s4) + PTR_ADD s4, s4, SZREG + PTR_ADD s2, s2, SZREG + LONG_SUB s6, s6, 1 + beq s6, zero, process_entry + b copy_word + b process_entry + +done: + /* jump to kexec_start_address */ + j s1 + END(relocate_new_kernel) + +kexec_start_address: + EXPORT(kexec_start_address) + PTR 0x0 + .size kexec_start_address, PTRSIZE + +kexec_indirection_page: + EXPORT(kexec_indirection_page) + PTR 0 + .size kexec_indirection_page, PTRSIZE + +relocate_new_kernel_end: + +relocate_new_kernel_size: + EXPORT(relocate_new_kernel_size) + PTR relocate_new_kernel_end - relocate_new_kernel + .size relocate_new_kernel_size, PTRSIZE |