97 lines
2.0 KiB
ArmAsm
97 lines
2.0 KiB
ArmAsm
|
/*
|
||
|
|
* Copyright (C) 2012 Gateworks Corporation
|
||
|
|
* Chris Lang <clang@gateworks.com>
|
||
|
|
*
|
||
|
|
* 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/asm-offsets.h>
|
||
|
|
|
||
|
|
#define D_CACHE_LINE_SIZE 32
|
||
|
|
|
||
|
|
.text
|
||
|
|
|
||
|
|
/*
|
||
|
|
* R8 - DMA Start Address
|
||
|
|
* R9 - DMA Length
|
||
|
|
* R10 - DMA Direction
|
||
|
|
* R11 - DMA type
|
||
|
|
* R12 - fiq_buffer Address
|
||
|
|
* R13 - DMA type Address
|
||
|
|
*/
|
||
|
|
|
||
|
|
.global cns3xxx_fiq_end
|
||
|
|
ENTRY(cns3xxx_fiq_start)
|
||
|
|
mov r8, #0
|
||
|
|
str r8, [r13]
|
||
|
|
|
||
|
|
ldr r9, [r12]
|
||
|
|
ldr r8, [r9]
|
||
|
|
add r8, r8, #1
|
||
|
|
str r8, [r9]
|
||
|
|
|
||
|
|
ldmib r12, {r8, r9, r10}
|
||
|
|
and r11, r10, #0x3000000
|
||
|
|
and r10, r10, #0xff
|
||
|
|
|
||
|
|
teq r11, #0x1000000
|
||
|
|
beq cns3xxx_dma_map_area
|
||
|
|
teq r11, #0x2000000
|
||
|
|
beq cns3xxx_dma_unmap_area
|
||
|
|
b cns3xxx_dma_flush_range
|
||
|
|
|
||
|
|
cns3xxx_fiq_exit:
|
||
|
|
mov r8, #0
|
||
|
|
str r8, [r12, #12]
|
||
|
|
mcr p15, 0, r8, c7, c10, 4 @ drain write buffer
|
||
|
|
subs pc, lr, #4
|
||
|
|
|
||
|
|
cns3xxx_dma_map_area:
|
||
|
|
add r9, r9, r8
|
||
|
|
teq r10, #DMA_FROM_DEVICE
|
||
|
|
beq cns3xxx_dma_inv_range
|
||
|
|
b cns3xxx_dma_clean_range
|
||
|
|
|
||
|
|
cns3xxx_dma_unmap_area:
|
||
|
|
add r9, r9, r8
|
||
|
|
teq r10, #DMA_TO_DEVICE
|
||
|
|
bne cns3xxx_dma_inv_range
|
||
|
|
b cns3xxx_fiq_exit
|
||
|
|
|
||
|
|
cns3xxx_dma_flush_range:
|
||
|
|
bic r8, r8, #D_CACHE_LINE_SIZE - 1
|
||
|
|
1:
|
||
|
|
mcr p15, 0, r8, c7, c14, 1 @ clean & invalidate D line
|
||
|
|
add r8, r8, #D_CACHE_LINE_SIZE
|
||
|
|
cmp r8, r9
|
||
|
|
blo 1b
|
||
|
|
b cns3xxx_fiq_exit
|
||
|
|
|
||
|
|
cns3xxx_dma_clean_range:
|
||
|
|
bic r8, r8, #D_CACHE_LINE_SIZE - 1
|
||
|
|
1:
|
||
|
|
mcr p15, 0, r8, c7, c10, 1 @ clean D line
|
||
|
|
add r8, r8, #D_CACHE_LINE_SIZE
|
||
|
|
cmp r8, r9
|
||
|
|
blo 1b
|
||
|
|
b cns3xxx_fiq_exit
|
||
|
|
|
||
|
|
cns3xxx_dma_inv_range:
|
||
|
|
tst r8, #D_CACHE_LINE_SIZE - 1
|
||
|
|
bic r8, r8, #D_CACHE_LINE_SIZE - 1
|
||
|
|
mcrne p15, 0, r8, c7, c10, 1 @ clean D line
|
||
|
|
tst r9, #D_CACHE_LINE_SIZE - 1
|
||
|
|
bic r9, r9, #D_CACHE_LINE_SIZE - 1
|
||
|
|
mcrne p15, 0, r9, c7, c14, 1 @ clean & invalidate D line
|
||
|
|
1:
|
||
|
|
mcr p15, 0, r8, c7, c6, 1 @ invalidate D line
|
||
|
|
add r8, r8, #D_CACHE_LINE_SIZE
|
||
|
|
cmp r8, r9
|
||
|
|
blo 1b
|
||
|
|
b cns3xxx_fiq_exit
|
||
|
|
|
||
|
|
cns3xxx_fiq_end:
|