openwrtv4/target/linux/oxnas/files/arch/arm/mach-oxnas/fiq.S
John Crispin 72b58f2eb1 add new target 'oxnas'
This is the oxnas target previously developed at
http://gitorious.org/openwrt-oxnas
Basically, this consolidates the changes and addtionas from
http://github.org/kref/linux-oxnas
into a new OpenWrt hardware target 'oxnas' adding support for
 PLX Technology NAS7820/NAS7821/NAS7825/...
formally known as
 Oxford Semiconductor OXE810SE/OXE815/OX820/...

For now there are 4 supported boards:
Cloud Engines Pogoplug V3 (without PCIe)
 fully supported

Cloud Engines Pogoplug Pro (with PCIe)
 fully supported

MitraStar STG-212
 aka ZyXEL NSA-212,
 aka Medion Akoya P89625 / P89636 / P89626 / P89630,
 aka Medion MD 86407 / MD 86805 / MD 86517 / MD 86587
 fully supported, see http://wiki.openwrt.org/toh/medion/md86587

Shuttle KD-20
 partially supported (S-ATA driver lacks support for 2nd port)

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

SVN-Revision: 43388
2014-11-26 09:00:08 +00:00

87 lines
1.9 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
*/
.global ox820_fiq_end
ENTRY(ox820_fiq_start)
str r8, [r13]
ldmia r12, {r8, r9, r10}
and r11, r10, #0x3000000
and r10, r10, #0xff
teq r11, #0x1000000
beq ox820_dma_map_area
teq r11, #0x2000000
beq ox820_dma_unmap_area
/* fall through */
ox820_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
/* fall through */
ox820_fiq_exit:
mov r8, #0
str r8, [r12, #8]
mcr p15, 0, r8, c7, c10, 4 @ drain write buffer
subs pc, lr, #4
ox820_dma_map_area:
add r9, r9, r8
teq r10, #DMA_FROM_DEVICE
beq ox820_dma_inv_range
teq r10, #DMA_TO_DEVICE
bne ox820_dma_flush_range
/* fall through */
ox820_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 ox820_fiq_exit
ox820_dma_unmap_area:
add r9, r9, r8
teq r10, #DMA_TO_DEVICE
beq ox820_fiq_exit
/* fall through */
ox820_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 ox820_fiq_exit
ox820_fiq_end: