mirror of https://gitee.com/openkylin/linux.git
89 lines
2.0 KiB
ArmAsm
89 lines
2.0 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* crt0_s.S: Entry function for SPU-side context save.
|
|
*
|
|
* Copyright (C) 2005 IBM
|
|
*
|
|
* Entry function for SPU-side of the context save sequence.
|
|
* Saves all 128 GPRs, sets up an initial stack frame, then
|
|
* branches to 'main'.
|
|
*/
|
|
|
|
#include <asm/spu_csa.h>
|
|
|
|
.data
|
|
.align 7
|
|
.globl regs_spill
|
|
regs_spill:
|
|
.space SIZEOF_SPU_SPILL_REGS, 0x0
|
|
|
|
.text
|
|
.global _start
|
|
_start:
|
|
/* SPU Context Save Step 1: Save the first 16 GPRs. */
|
|
stqa $0, regs_spill + 0
|
|
stqa $1, regs_spill + 16
|
|
stqa $2, regs_spill + 32
|
|
stqa $3, regs_spill + 48
|
|
stqa $4, regs_spill + 64
|
|
stqa $5, regs_spill + 80
|
|
stqa $6, regs_spill + 96
|
|
stqa $7, regs_spill + 112
|
|
stqa $8, regs_spill + 128
|
|
stqa $9, regs_spill + 144
|
|
stqa $10, regs_spill + 160
|
|
stqa $11, regs_spill + 176
|
|
stqa $12, regs_spill + 192
|
|
stqa $13, regs_spill + 208
|
|
stqa $14, regs_spill + 224
|
|
stqa $15, regs_spill + 240
|
|
|
|
/* SPU Context Save, Step 8: Save the remaining 112 GPRs. */
|
|
ila $3, regs_spill + 256
|
|
save_regs:
|
|
lqr $4, save_reg_insts
|
|
save_reg_loop:
|
|
ai $4, $4, 4
|
|
.balignl 16, 0x40200000
|
|
save_reg_insts: /* must be quad-word aligned. */
|
|
stqd $16, 0($3)
|
|
stqd $17, 16($3)
|
|
stqd $18, 32($3)
|
|
stqd $19, 48($3)
|
|
andi $5, $4, 0x7F
|
|
stqr $4, save_reg_insts
|
|
ai $3, $3, 64
|
|
brnz $5, save_reg_loop
|
|
|
|
/* Initialize the stack pointer to point to 16368
|
|
* (16kb-16). The back chain pointer is initialized
|
|
* to NULL.
|
|
*/
|
|
il $0, 0
|
|
il $SP, 16368
|
|
stqd $0, 0($SP)
|
|
|
|
/* Allocate a minimum stack frame for the called main.
|
|
* This is needed so that main has a place to save the
|
|
* link register when it calls another function.
|
|
*/
|
|
stqd $SP, -160($SP)
|
|
ai $SP, $SP, -160
|
|
|
|
/* Call the program's main function. */
|
|
brsl $0, main
|
|
|
|
/* In this case main should not return; if it does
|
|
* there has been an error in the sequence. Execute
|
|
* stop-and-signal with code=0.
|
|
*/
|
|
.global exit
|
|
.global _exit
|
|
exit:
|
|
_exit:
|
|
stop 0x0
|
|
|
|
/* Pad the size of this crt0.o to be multiple of 16 bytes. */
|
|
.balignl 16, 0x0
|
|
|