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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/scsi/arm/acornscsi-io.S | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
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!
Diffstat (limited to 'drivers/scsi/arm/acornscsi-io.S')
-rw-r--r-- | drivers/scsi/arm/acornscsi-io.S | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/drivers/scsi/arm/acornscsi-io.S b/drivers/scsi/arm/acornscsi-io.S new file mode 100644 index 0000000..93467e6 --- /dev/null +++ b/drivers/scsi/arm/acornscsi-io.S @@ -0,0 +1,145 @@ +/* + * 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}) + |