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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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83 lines
1.6 KiB
ArmAsm
83 lines
1.6 KiB
ArmAsm
/*
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* relocate_kernel.S for kexec
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* Created by <nschichan@corp.free.fr> on Thu Oct 12 17:49:57 2006
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*
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* This source code is licensed under the GNU General Public License,
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* Version 2. See the file COPYING for more details.
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*/
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#include <asm/asm.h>
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#include <asm/asmmacro.h>
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#include <asm/regdef.h>
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#include <asm/page.h>
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#include <asm/mipsregs.h>
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#include <asm/stackframe.h>
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#include <asm/addrspace.h>
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LEAF(relocate_new_kernel)
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PTR_L s0, kexec_indirection_page
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PTR_L s1, kexec_start_address
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process_entry:
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PTR_L s2, (s0)
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PTR_ADD s0, s0, SZREG
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/* destination page */
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and s3, s2, 0x1
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beq s3, zero, 1f
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and s4, s2, ~0x1 /* store destination addr in s4 */
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move a0, s4
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b process_entry
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1:
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/* indirection page, update s0 */
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and s3, s2, 0x2
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beq s3, zero, 1f
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and s0, s2, ~0x2
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b process_entry
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1:
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/* done page */
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and s3, s2, 0x4
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beq s3, zero, 1f
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b done
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1:
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/* source page */
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and s3, s2, 0x8
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beq s3, zero, process_entry
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and s2, s2, ~0x8
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li s6, (1 << PAGE_SHIFT) / SZREG
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copy_word:
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/* copy page word by word */
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REG_L s5, (s2)
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REG_S s5, (s4)
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PTR_ADD s4, s4, SZREG
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PTR_ADD s2, s2, SZREG
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LONG_SUB s6, s6, 1
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beq s6, zero, process_entry
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b copy_word
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b process_entry
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done:
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/* jump to kexec_start_address */
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j s1
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END(relocate_new_kernel)
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kexec_start_address:
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EXPORT(kexec_start_address)
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PTR 0x0
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.size kexec_start_address, PTRSIZE
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kexec_indirection_page:
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EXPORT(kexec_indirection_page)
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PTR 0
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.size kexec_indirection_page, PTRSIZE
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relocate_new_kernel_end:
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relocate_new_kernel_size:
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EXPORT(relocate_new_kernel_size)
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PTR relocate_new_kernel_end - relocate_new_kernel
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.size relocate_new_kernel_size, PTRSIZE
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