diff options
Diffstat (limited to 'arch/riscv/include/asm/assembler.h')
| -rw-r--r-- | arch/riscv/include/asm/assembler.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/riscv/include/asm/assembler.h b/arch/riscv/include/asm/assembler.h index ba59d38f8937..44b1457d3e95 100644 --- a/arch/riscv/include/asm/assembler.h +++ b/arch/riscv/include/asm/assembler.h @@ -59,4 +59,24 @@ REG_L s11, (SUSPEND_CONTEXT_REGS + PT_S11)(a0) .endm +/* + * copy_page - copy 1 page (4KB) of data from source to destination + * @a0 - destination + * @a1 - source + */ + .macro copy_page a0, a1 + lui a2, 0x1 + add a2, a2, a0 +1 : + REG_L t0, 0(a1) + REG_L t1, SZREG(a1) + + REG_S t0, 0(a0) + REG_S t1, SZREG(a0) + + addi a0, a0, 2 * SZREG + addi a1, a1, 2 * SZREG + bne a2, a0, 1b + .endm + #endif /* __ASM_ASSEMBLER_H */ |