mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-18 00:24:58 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
146 lines
3.5 KiB
ArmAsm
146 lines
3.5 KiB
ArmAsm
/*
|
|
* linux/drivers/acorn/scsi/acornscsi-io.S: Acorn SCSI card IO
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/linkage.h>
|
|
|
|
#include <asm/assembler.h>
|
|
#include <asm/hardware.h>
|
|
|
|
#if (IO_BASE == (PCIO_BASE & 0xff000000))
|
|
#define ADDR(off,reg) \
|
|
tst off, $0x80000000 ;\
|
|
mov reg, $IO_BASE ;\
|
|
orreq reg, reg, $(PCIO_BASE & 0x00ff0000)
|
|
#else
|
|
#define ADDR(off,reg) \
|
|
tst off, $0x80000000 ;\
|
|
movne reg, $IO_BASE ;\
|
|
moveq reg, $(PCIO_BASE & 0xff000000) ;\
|
|
orreq reg, reg, $(PCIO_BASE & 0x00ff0000)
|
|
#endif
|
|
|
|
@ Purpose: transfer a block of data from the acorn scsi card to memory
|
|
@ Proto : void acornscsi_in(unsigned int addr_start, char *buffer, int length)
|
|
@ Returns: nothing
|
|
|
|
.align
|
|
ENTRY(__acornscsi_in)
|
|
stmfd sp!, {r4 - r7, lr}
|
|
bic r0, r0, #3
|
|
mov lr, #0xff
|
|
orr lr, lr, #0xff00
|
|
acornscsi_in16lp:
|
|
subs r2, r2, #16
|
|
bmi acornscsi_in8
|
|
ldmia r0!, {r3, r4, r5, r6}
|
|
and r3, r3, lr
|
|
orr r3, r3, r4, lsl #16
|
|
and r4, r5, lr
|
|
orr r4, r4, r6, lsl #16
|
|
ldmia r0!, {r5, r6, r7, ip}
|
|
and r5, r5, lr
|
|
orr r5, r5, r6, lsl #16
|
|
and r6, r7, lr
|
|
orr r6, r6, ip, lsl #16
|
|
stmia r1!, {r3 - r6}
|
|
bne acornscsi_in16lp
|
|
LOADREGS(fd, sp!, {r4 - r7, pc})
|
|
|
|
acornscsi_in8: adds r2, r2, #8
|
|
bmi acornscsi_in4
|
|
ldmia r0!, {r3, r4, r5, r6}
|
|
and r3, r3, lr
|
|
orr r3, r3, r4, lsl #16
|
|
and r4, r5, lr
|
|
orr r4, r4, r6, lsl #16
|
|
stmia r1!, {r3 - r4}
|
|
LOADREGS(eqfd, sp!, {r4 - r7, pc})
|
|
sub r2, r2, #8
|
|
|
|
acornscsi_in4: adds r2, r2, #4
|
|
bmi acornscsi_in2
|
|
ldmia r0!, {r3, r4}
|
|
and r3, r3, lr
|
|
orr r3, r3, r4, lsl #16
|
|
str r3, [r1], #4
|
|
LOADREGS(eqfd, sp!, {r4 - r7, pc})
|
|
sub r2, r2, #4
|
|
|
|
acornscsi_in2: adds r2, r2, #2
|
|
ldr r3, [r0], #4
|
|
and r3, r3, lr
|
|
strb r3, [r1], #1
|
|
mov r3, r3, lsr #8
|
|
strplb r3, [r1], #1
|
|
LOADREGS(fd, sp!, {r4 - r7, pc})
|
|
|
|
@ Purpose: transfer a block of data from memory to the acorn scsi card
|
|
@ Proto : void acornscsi_in(unsigned int addr_start, char *buffer, int length)
|
|
@ Returns: nothing
|
|
|
|
ENTRY(__acornscsi_out)
|
|
stmfd sp!, {r4 - r6, lr}
|
|
bic r0, r0, #3
|
|
acornscsi_out16lp:
|
|
subs r2, r2, #16
|
|
bmi acornscsi_out8
|
|
ldmia r1!, {r4, r6, ip, lr}
|
|
mov r3, r4, lsl #16
|
|
orr r3, r3, r3, lsr #16
|
|
mov r4, r4, lsr #16
|
|
orr r4, r4, r4, lsl #16
|
|
mov r5, r6, lsl #16
|
|
orr r5, r5, r5, lsr #16
|
|
mov r6, r6, lsr #16
|
|
orr r6, r6, r6, lsl #16
|
|
stmia r0!, {r3, r4, r5, r6}
|
|
mov r3, ip, lsl #16
|
|
orr r3, r3, r3, lsr #16
|
|
mov r4, ip, lsr #16
|
|
orr r4, r4, r4, lsl #16
|
|
mov ip, lr, lsl #16
|
|
orr ip, ip, ip, lsr #16
|
|
mov lr, lr, lsr #16
|
|
orr lr, lr, lr, lsl #16
|
|
stmia r0!, {r3, r4, ip, lr}
|
|
bne acornscsi_out16lp
|
|
LOADREGS(fd, sp!, {r4 - r6, pc})
|
|
|
|
acornscsi_out8: adds r2, r2, #8
|
|
bmi acornscsi_out4
|
|
ldmia r1!, {r4, r6}
|
|
mov r3, r4, lsl #16
|
|
orr r3, r3, r3, lsr #16
|
|
mov r4, r4, lsr #16
|
|
orr r4, r4, r4, lsl #16
|
|
mov r5, r6, lsl #16
|
|
orr r5, r5, r5, lsr #16
|
|
mov r6, r6, lsr #16
|
|
orr r6, r6, r6, lsl #16
|
|
stmia r0!, {r3, r4, r5, r6}
|
|
LOADREGS(eqfd, sp!, {r4 - r6, pc})
|
|
|
|
sub r2, r2, #8
|
|
acornscsi_out4: adds r2, r2, #4
|
|
bmi acornscsi_out2
|
|
ldr r4, [r1], #4
|
|
mov r3, r4, lsl #16
|
|
orr r3, r3, r3, lsr #16
|
|
mov r4, r4, lsr #16
|
|
orr r4, r4, r4, lsl #16
|
|
stmia r0!, {r3, r4}
|
|
LOADREGS(eqfd, sp!, {r4 - r6, pc})
|
|
|
|
sub r2, r2, #4
|
|
acornscsi_out2: adds r2, r2, #2
|
|
ldr r3, [r1], #2
|
|
strb r3, [r0], #1
|
|
mov r3, r3, lsr #8
|
|
strplb r3, [r0], #1
|
|
LOADREGS(fd, sp!, {r4 - r6, pc})
|
|
|