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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6

Browse Source 
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6:
  Blackfin arch: make sure cycles is marked as volatile so gcc doesnt reorder on us
  Blackfin arch: disable CONFIG_HW_RANDOM and CONFIG_DAB in defconfig files
  Blackfin arch: update cache flush prototypes with argument names to make them less mysterious
  Blackfin arch: move bfin_addr_dcachable() and friends into the cacheflush header where it belongs
  Blackfin arch: use the new bfin_addr_dcachable() function
  Blackfin arch: fix bug - build kernel failed at head.S when reprogram clock on all platforms
  Blackfin arch: unify/cleanup cache code
  Blackfin arch: update AD7879 platform resources in board file
  Blackfin arch: Zero out bss region in L1/L2 memory.
  Blackfin arch: add read/write IO accessor functions to Blackfin
  Blackfin arch: fix bug - some serial header files set RTS to an input when they should all be outputs
This commit is contained in:
Linus Torvalds 2008-10-16 12:45:08 -07:00
commit 1b821bfb03
29 changed files with 210 additions and 174 deletions
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2
arch/blackfin/configs/BF526-EZBRD_defconfig
View File

@ -748,7 +748,7 @@ CONFIG_BFIN_OTP=y
#
# CONFIG_CAN4LINUX is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set

2
arch/blackfin/configs/BF527-EZKIT_defconfig
View File

@ -772,7 +772,7 @@ CONFIG_UNIX98_PTYS=y
#
# CONFIG_CAN4LINUX is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set

4
arch/blackfin/configs/BF533-EZKIT_defconfig
View File

@ -674,7 +674,7 @@ CONFIG_UNIX98_PTYS=y
#
# CONFIG_CAN4LINUX is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
@ -740,7 +740,7 @@ CONFIG_SSB_POSSIBLE=y
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
CONFIG_DAB=y
# CONFIG_DAB is not set
#
# Graphics support

2
arch/blackfin/configs/BF533-STAMP_defconfig
View File

@ -681,7 +681,7 @@ CONFIG_UNIX98_PTYS=y
#
# CONFIG_CAN4LINUX is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set

4
arch/blackfin/configs/BF537-STAMP_defconfig
View File

@ -731,7 +731,7 @@ CONFIG_CAN4LINUX=y
# CONFIG_CAN_UNCTWINCAN is not set
CONFIG_CAN_BLACKFIN=m
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
@ -871,7 +871,7 @@ CONFIG_SSB_POSSIBLE=y
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
CONFIG_DAB=y
# CONFIG_DAB is not set
#
# Graphics support

4
arch/blackfin/configs/BF548-EZKIT_defconfig
View File

@ -855,7 +855,7 @@ CONFIG_UNIX98_PTYS=y
#
# CONFIG_CAN4LINUX is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
@ -1001,7 +1001,7 @@ CONFIG_SSB_POSSIBLE=y
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
CONFIG_DAB=y
# CONFIG_DAB is not set
# CONFIG_USB_DABUSB is not set
#

4
arch/blackfin/configs/BF561-EZKIT_defconfig
View File

@ -719,7 +719,7 @@ CONFIG_UNIX98_PTYS=y
#
# CONFIG_CAN4LINUX is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
@ -785,7 +785,7 @@ CONFIG_SSB_POSSIBLE=y
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
CONFIG_DAB=y
# CONFIG_DAB is not set
#
# Graphics support

2
arch/blackfin/configs/CM-BF527_defconfig
View File

@ -679,7 +679,7 @@ CONFIG_UNIX98_PTYS=y
#
# CONFIG_CAN4LINUX is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set

2
arch/blackfin/configs/CM-BF533_defconfig
View File

@ -672,7 +672,7 @@ CONFIG_HWMON=y
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
CONFIG_DAB=y
# CONFIG_DAB is not set
#
# Graphics support

2
arch/blackfin/configs/CM-BF537E_defconfig
View File

@ -703,7 +703,7 @@ CONFIG_HWMON=y
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
CONFIG_DAB=y
# CONFIG_DAB is not set
#
# Graphics support

2
arch/blackfin/configs/CM-BF537U_defconfig
View File

@ -683,7 +683,7 @@ CONFIG_HWMON=y
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
CONFIG_DAB=y
# CONFIG_DAB is not set
#
# Graphics support

4
arch/blackfin/configs/CM-BF548_defconfig
View File

@ -762,7 +762,7 @@ CONFIG_UNIX98_PTYS=y
#
# CONFIG_CAN4LINUX is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM is not set
# CONFIG_GEN_RTC is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
@ -909,7 +909,7 @@ CONFIG_SSB_POSSIBLE=y
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
CONFIG_DAB=y
# CONFIG_DAB is not set
# CONFIG_USB_DABUSB is not set
#

2
arch/blackfin/configs/CM-BF561_defconfig
View File

@ -684,7 +684,7 @@ CONFIG_SSB_POSSIBLE=y
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
CONFIG_DAB=y
# CONFIG_DAB is not set
#
# Graphics support

27
arch/blackfin/include/asm/cacheflush.h
View File

@ -30,11 +30,11 @@
#ifndef _BLACKFIN_CACHEFLUSH_H
#define _BLACKFIN_CACHEFLUSH_H
extern void blackfin_icache_dcache_flush_range(unsigned int, unsigned int);
extern void blackfin_icache_flush_range(unsigned int, unsigned int);
extern void blackfin_dcache_flush_range(unsigned int, unsigned int);
extern void blackfin_dcache_invalidate_range(unsigned int, unsigned int);
extern void blackfin_dflush_page(void *);
extern void blackfin_icache_dcache_flush_range(unsigned long start_address, unsigned long end_address);
extern void blackfin_icache_flush_range(unsigned long start_address, unsigned long end_address);
extern void blackfin_dcache_flush_range(unsigned long start_address, unsigned long end_address);
extern void blackfin_dcache_invalidate_range(unsigned long start_address, unsigned long end_address);
extern void blackfin_dflush_page(void *page);
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
@ -85,4 +85,21 @@ do { memcpy(dst, src, len); \
# define flush_dcache_page(page) do { } while (0)
#endif
extern unsigned long reserved_mem_dcache_on;
extern unsigned long reserved_mem_icache_on;
static inline int bfin_addr_dcachable(unsigned long addr)
{
#ifdef CONFIG_BFIN_DCACHE
if (addr < (_ramend - DMA_UNCACHED_REGION))
return 1;
#endif
if (reserved_mem_dcache_on &&
addr >= _ramend && addr < physical_mem_end)
return 1;
return 0;
}
#endif /* _BLACKFIN_ICACHEFLUSH_H */

17
arch/blackfin/include/asm/cplbinit.h
View File

@ -87,23 +87,6 @@ extern u_long dpdt_swapcount_table[];
#endif /* CONFIG_MPU */
extern unsigned long reserved_mem_dcache_on;
extern unsigned long reserved_mem_icache_on;
extern void generate_cplb_tables(void);
static inline int bfin_addr_dcachable(unsigned long addr)
{
#ifdef CONFIG_BFIN_DCACHE
if (addr < (_ramend - DMA_UNCACHED_REGION))
return 1;
#endif
if (reserved_mem_dcache_on &&
addr >= _ramend && addr < physical_mem_end)
return 1;
return 0;
}
#endif

30
arch/blackfin/include/asm/io.h
View File

@ -134,6 +134,36 @@ extern void dma_insb(unsigned long port, void *addr, unsigned short count);
extern void dma_insw(unsigned long port, void *addr, unsigned short count);
extern void dma_insl(unsigned long port, void *addr, unsigned short count);
static inline void readsl(const void __iomem *addr, void *buf, int len)
{
insl((unsigned long)addr, buf, len);
}
static inline void readsw(const void __iomem *addr, void *buf, int len)
{
insw((unsigned long)addr, buf, len);
}
static inline void readsb(const void __iomem *addr, void *buf, int len)
{
insb((unsigned long)addr, buf, len);
}
static inline void writesl(const void __iomem *addr, const void *buf, int len)
{
outsl((unsigned long)addr, buf, len);
}
static inline void writesw(const void __iomem *addr, const void *buf, int len)
{
outsw((unsigned long)addr, buf, len);
}
static inline void writesb(const void __iomem *addr, const void *buf, int len)
{
outsb((unsigned long)addr, buf, len);
}
/*
* Map some physical address range into the kernel address space.
*/

2
arch/blackfin/include/asm/timex.h
View File

@ -16,7 +16,7 @@ typedef unsigned long long cycles_t;
static inline cycles_t get_cycles(void)
{
unsigned long tmp, tmp2;
__asm__("%0 = cycles; %1 = cycles2;" : "=d"(tmp), "=d"(tmp2));
__asm__ __volatile__("%0 = cycles; %1 = cycles2;" : "=d"(tmp), "=d"(tmp2));
return tmp | ((cycles_t)tmp2 << 32);
}

5
arch/blackfin/kernel/cplb-mpu/cplbmgr.c
View File

@ -21,6 +21,7 @@
#include <linux/mm.h>
#include <asm/blackfin.h>
#include <asm/cacheflush.h>
#include <asm/cplbinit.h>
#include <asm/mmu_context.h>
@ -144,9 +145,7 @@ static noinline int dcplb_miss(void)
d_data = CPLB_SUPV_WR | CPLB_VALID | CPLB_DIRTY | PAGE_SIZE_4KB;
#ifdef CONFIG_BFIN_DCACHE
if (addr < _ramend - DMA_UNCACHED_REGION ||
(reserved_mem_dcache_on && addr >= _ramend &&
addr < physical_mem_end)) {
if (bfin_addr_dcachable(addr)) {
d_data |= CPLB_L1_CHBL | ANOMALY_05000158_WORKAROUND;
#ifdef CONFIG_BFIN_WT
d_data |= CPLB_L1_AOW | CPLB_WT;

1
arch/blackfin/kernel/cplb-nompu/cplbinit.c
View File

@ -23,6 +23,7 @@
#include <linux/module.h>
#include <asm/blackfin.h>
#include <asm/cacheflush.h>
#include <asm/cplb.h>
#include <asm/cplbinit.h>

2
arch/blackfin/mach-bf527/head.S
View File

@ -88,7 +88,7 @@ ENTRY(_start_dma_code)
r1 = r1 << 8; /* Shift it over */
r0 = r1 | r0; /* add them all together */
#ifdef ANOMALY_05000265
r0 = BITSET(r0, 15); /* Add 250 mV of hysteresis to SPORT input pins */
BITSET(r0, 15); /* Add 250 mV of hysteresis to SPORT input pins */
#endif
p0.h = hi(PLL_CTL);

2
arch/blackfin/mach-bf533/head.S
View File

@ -79,7 +79,7 @@ ENTRY(_start_dma_code)
r1 = r1 << 8; /* Shift it over */
r0 = r1 | r0; /* add them all together */
#ifdef ANOMALY_05000265
r0 = BITSET(r0, 15); /* Add 250 mV of hysteresis to SPORT input pins */
BITSET(r0, 15); /* Add 250 mV of hysteresis to SPORT input pins */
#endif
p0.h = hi(PLL_CTL);

2
arch/blackfin/mach-bf533/include/mach/bfin_serial_5xx.h
View File

@ -158,7 +158,7 @@ static void bfin_serial_hw_init(struct bfin_serial_port *uart)
}
if (uart->rts_pin >= 0) {
gpio_request(uart->rts_pin, DRIVER_NAME);
gpio_direction_input(uart->rts_pin, 0);
gpio_direction_output(uart->rts_pin, 0);
}
#endif
}

25
arch/blackfin/mach-bf537/boards/stamp.c
View File

@ -577,11 +577,6 @@ static const struct ad7877_platform_data bfin_ad7877_ts_info = {
#if defined(CONFIG_TOUCHSCREEN_AD7879) || defined(CONFIG_TOUCHSCREEN_AD7879_MODULE)
#include <linux/spi/ad7879.h>
static struct bfin5xx_spi_chip spi_ad7879_chip_info = {
.enable_dma = 0,
.bits_per_word = 16,
};
static const struct ad7879_platform_data bfin_ad7879_ts_info = {
.model = 7879, /* Model = AD7879 */
.x_plate_ohms = 620, /* 620 Ohm from the touch datasheet */
@ -597,6 +592,13 @@ static const struct ad7879_platform_data bfin_ad7879_ts_info = {
};
#endif
#if defined(CONFIG_TOUCHSCREEN_AD7879_SPI) || defined(CONFIG_TOUCHSCREEN_AD7879_SPI_MODULE)
static struct bfin5xx_spi_chip spi_ad7879_chip_info = {
.enable_dma = 0,
.bits_per_word = 16,
};
#endif
#if defined(CONFIG_SPI_SPIDEV) || defined(CONFIG_SPI_SPIDEV_MODULE)
static struct bfin5xx_spi_chip spidev_chip_info = {
.enable_dma = 0,
@ -750,7 +752,7 @@ static struct spi_board_info bfin_spi_board_info[] __initdata = {
.controller_data = &spi_ad7877_chip_info,
},
#endif
#if defined(CONFIG_TOUCHSCREEN_AD7879) || defined(CONFIG_TOUCHSCREEN_AD7879_MODULE)
#if defined(CONFIG_TOUCHSCREEN_AD7879_SPI) || defined(CONFIG_TOUCHSCREEN_AD7879_SPI_MODULE)
{
.modalias = "ad7879",
.platform_data = &bfin_ad7879_ts_info,
@ -935,7 +937,7 @@ static struct i2c_board_info __initdata bfin_i2c_board_info[] = {
#if defined(CONFIG_JOYSTICK_AD7142) || defined(CONFIG_JOYSTICK_AD7142_MODULE)
{
I2C_BOARD_INFO("ad7142_joystick", 0x2C),
.irq = 55,
.irq = IRQ_PF5,
},
#endif
#if defined(CONFIG_TWI_LCD) || defined(CONFIG_TWI_LCD_MODULE)
@ -946,7 +948,14 @@ static struct i2c_board_info __initdata bfin_i2c_board_info[] = {
#if defined(CONFIG_TWI_KEYPAD) || defined(CONFIG_TWI_KEYPAD_MODULE)
{
I2C_BOARD_INFO("pcf8574_keypad", 0x27),
.irq = 72,
.irq = IRQ_PG6,
},
#endif
#if defined(CONFIG_TOUCHSCREEN_AD7879_I2C) || defined(CONFIG_TOUCHSCREEN_AD7879_I2C_MODULE)
{
I2C_BOARD_INFO("ad7879", 0x2F),
.irq = IRQ_PG5,
.platform_data = (void *)&bfin_ad7879_ts_info,
},
#endif
};

2
arch/blackfin/mach-bf537/head.S
View File

@ -88,7 +88,7 @@ ENTRY(_start_dma_code)
r1 = r1 << 8; /* Shift it over */
r0 = r1 | r0; /* add them all together */
#ifdef ANOMALY_05000265
r0 = BITSET(r0, 15); /* Add 250 mV of hysteresis to SPORT input pins */
BITSET(r0, 15); /* Add 250 mV of hysteresis to SPORT input pins */
#endif
p0.h = hi(PLL_CTL);

2
arch/blackfin/mach-bf548/head.S
View File

@ -95,7 +95,7 @@ ENTRY(_start_dma_code)
r1 = r1 << 8; /* Shift it over */
r0 = r1 | r0; /* add them all together */
#ifdef ANOMALY_05000265
r0 = BITSET(r0, 15); /* Add 250 mV of hysteresis to SPORT input pins */
BITSET(r0, 15); /* Add 250 mV of hysteresis to SPORT input pins */
#endif
p0.h = hi(PLL_CTL);

2
arch/blackfin/mach-bf561/head.S
View File

@ -78,7 +78,7 @@ ENTRY(_start_dma_code)
r1 = r1 << 8; /* Shift it over */
r0 = r1 | r0; /* add them all together */
#ifdef ANOMALY_05000265
r0 = BITSET(r0, 15); /* Add 250 mV of hysteresis to SPORT input pins */
BITSET(r0, 15); /* Add 250 mV of hysteresis to SPORT input pins */
#endif
p0.h = hi(PLL_CTL);

2
arch/blackfin/mach-bf561/include/mach/bfin_serial_5xx.h
View File

@ -158,7 +158,7 @@ static void bfin_serial_hw_init(struct bfin_serial_port *uart)
}
if (uart->rts_pin >= 0) {
gpio_request(uart->rts_pin, DRIVER_NAME);
gpio_direction_input(uart->rts_pin, 0);
gpio_direction_output(uart->rts_pin, 0);
}
#endif
}

173
arch/blackfin/mach-common/cache.S
View File

@ -1,148 +1,91 @@
/*
* File: arch/blackfin/mach-common/cache.S
* Based on:
* Author: LG Soft India
* Blackfin cache control code
*
* Created:
* Description: cache control support
* Copyright 2004-2008 Analog Devices Inc.
*
* Modified:
* Copyright 2004-2006 Analog Devices Inc.
* Enter bugs at http://blackfin.uclinux.org/
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* Licensed under the GPL-2 or later.
*/
#include <linux/linkage.h>
#include <asm/cplb.h>
#include <asm/entry.h>
#include <asm/blackfin.h>
#include <asm/cache.h>
#include <asm/page.h>
.text
/*
* blackfin_cache_flush_range(start, end)
* Invalidate all cache lines assocoiated with this
* area of memory.
/* Since all L1 caches work the same way, we use the same method for flushing
* them. Only the actual flush instruction differs. We write this in asm as
* GCC can be hard to coax into writing nice hardware loops.
*
* start: Start address
* end: End address
* Also, we assume the following register setup:
* R0 = start address
* R1 = end address
*/
ENTRY(_blackfin_icache_flush_range)
.macro do_flush flushins:req optflushins optnopins label
/* end = ((end - 1) & -L1_CACHE_BYTES) + L1_CACHE_BYTES; */
R1 += -1;
R2 = -L1_CACHE_BYTES;
R2 = R0 & R2;
P0 = R2;
P1 = R1;
CSYNC(R3);
IFLUSH [P0];
R1 = R1 & R2;
R1 += L1_CACHE_BYTES;
/* count = (end - start) >> L1_CACHE_SHIFT */
R2 = R1 - R0;
R2 >>= L1_CACHE_SHIFT;
P1 = R2;
.ifnb \label
\label :
.endif
P0 = R0;
LSETUP (1f, 2f) LC1 = P1;
1:
IFLUSH [P0++];
CC = P0 < P1 (iu);
IF CC JUMP 1b (bp);
IFLUSH [P0];
SSYNC(R3);
.ifnb \optflushins
\optflushins [P0];
.endif
.ifb \optnopins
2:
.endif
\flushins [P0++];
.ifnb \optnopins
2: \optnopins;
.endif
RTS;
.endm
/* Invalidate all instruction cache lines assocoiated with this memory area */
ENTRY(_blackfin_icache_flush_range)
do_flush IFLUSH, , nop
ENDPROC(_blackfin_icache_flush_range)
/*
* blackfin_icache_dcache_flush_range(start, end)
* FLUSH all cache lines assocoiated with this
* area of memory.
*
* start: Start address
* end: End address
*/
/* Flush all cache lines assocoiated with this area of memory. */
ENTRY(_blackfin_icache_dcache_flush_range)
R2 = -L1_CACHE_BYTES;
R2 = R0 & R2;
P0 = R2;
P1 = R1;
CSYNC(R3);
IFLUSH [P0];
1:
FLUSH [P0];
IFLUSH [P0++];
CC = P0 < P1 (iu);
IF CC JUMP 1b (bp);
IFLUSH [P0];
FLUSH [P0];
SSYNC(R3);
RTS;
do_flush IFLUSH, FLUSH
ENDPROC(_blackfin_icache_dcache_flush_range)
/* Throw away all D-cached data in specified region without any obligation to
* write them back. However, we must clean the D-cached entries around the
* boundaries of the start and/or end address is not cache aligned.
*
* Start: start address,
* end : end address.
* write them back. Since the Blackfin ISA does not have an "invalidate"
* instruction, we use flush/invalidate. Perhaps as a speed optimization we
* could bang on the DTEST MMRs ...
*/
ENTRY(_blackfin_dcache_invalidate_range)
R2 = -L1_CACHE_BYTES;
R2 = R0 & R2;
P0 = R2;
P1 = R1;
CSYNC(R3);
FLUSHINV[P0];
1:
FLUSHINV[P0++];
CC = P0 < P1 (iu);
IF CC JUMP 1b (bp);
/* If the data crosses a cache line, then we'll be pointing to
* the last cache line, but won't have flushed/invalidated it yet,
* so do one more.
*/
FLUSHINV[P0];
SSYNC(R3);
RTS;
do_flush FLUSHINV
ENDPROC(_blackfin_dcache_invalidate_range)
/* Flush all data cache lines assocoiated with this memory area */
ENTRY(_blackfin_dcache_flush_range)
R2 = -L1_CACHE_BYTES;
R2 = R0 & R2;
P0 = R2;
P1 = R1;
CSYNC(R3);
FLUSH[P0];
1:
FLUSH[P0++];
CC = P0 < P1 (iu);
IF CC JUMP 1b (bp);
/* If the data crosses a cache line, then we'll be pointing to
* the last cache line, but won't have flushed it yet, so do
* one more.
*/
FLUSH[P0];
SSYNC(R3);
RTS;
do_flush FLUSH, , , .Ldfr
ENDPROC(_blackfin_dcache_flush_range)
/* Our headers convert the page structure to an address, so just need to flush
* its contents like normal. We know the start address is page aligned (which
* greater than our cache alignment), as is the end address. So just jump into
* the middle of the dcache flush function.
*/
ENTRY(_blackfin_dflush_page)
P1 = 1 << (PAGE_SHIFT - L1_CACHE_SHIFT);
P0 = R0;
CSYNC(R3);
FLUSH[P0];
LSETUP (.Lfl1, .Lfl1) LC0 = P1;
.Lfl1: FLUSH [P0++];
SSYNC(R3);
RTS;
jump .Ldfr;
ENDPROC(_blackfin_dflush_page)

54
arch/blackfin/mach-common/head.S
View File

@ -206,6 +206,60 @@ ENTRY(_real_start)
w[p0] = r0;
ssync;
#if L1_DATA_A_LENGTH > 0
r1.l = __sbss_l1;
r1.h = __sbss_l1;
r2.l = __ebss_l1;
r2.h = __ebss_l1;
r0 = 0 (z);
r2 = r2 - r1;
cc = r2 == 0;
if cc jump .L_a_l1_done;
r2 >>= 2;
p1 = r1;
p2 = r2;
lsetup (.L_clear_a_l1, .L_clear_a_l1 ) lc0 = p2;
.L_clear_a_l1:
[p1++] = r0;
.L_a_l1_done:
#endif
#if L1_DATA_B_LENGTH > 0
r1.l = __sbss_b_l1;
r1.h = __sbss_b_l1;
r2.l = __ebss_b_l1;
r2.h = __ebss_b_l1;
r0 = 0 (z);
r2 = r2 - r1;
cc = r2 == 0;
if cc jump .L_b_l1_done;
r2 >>= 2;
p1 = r1;
p2 = r2;
lsetup (.L_clear_b_l1, .L_clear_b_l1 ) lc0 = p2;
.L_clear_b_l1:
[p1++] = r0;
.L_b_l1_done:
#endif
#if L2_LENGTH > 0
r1.l = __sbss_l2;
r1.h = __sbss_l2;
r2.l = __ebss_l2;
r2.h = __ebss_l2;
r0 = 0 (z);
r2 = r2 - r1;
cc = r2 == 0;
if cc jump .L_l2_done;
r2 >>= 2;
p1 = r1;
p2 = r2;
lsetup (.L_clear_l2, .L_clear_l2 ) lc0 = p2;
.L_clear_l2:
[p1++] = r0;
.L_l2_done:
#endif
/* Zero out the bss region
* Note: this will fail if bss is 0 bytes ...
*/