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authorLennert Buytenhek <buytenh@wantstofly.org>2005-11-01 19:44:26 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-11-01 19:44:26 +0000
commite9b72e43d96a1ea2be0f513c78f16743a835d252 (patch)
treeed3a2cb9a84f56754ac1e4469c3a58f963b86237 /include/asm-arm/arch-ixp2000
parent69a857610ad212ce4bcd8e6b13f25408691403de (diff)
[ARM] 3064/1: start using ixp2000_reg_wrb
Patch from Lennert Buytenhek Switch the users of ixp2000_reg_write that depend on writes being flushed out of the write buffer by the time that function returns over to ixp2000_reg_wrb. When using XCB=101, writes to the same functional unit are still guaranteed to complete in order, so we only need to protect against: - reordering of writes to different functional units - masking an interrupt and then reenabling the IRQ bit in CPSR Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Deepak Saxena <dsaxena@plexity.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm/arch-ixp2000')
-rw-r--r--include/asm-arm/arch-ixp2000/system.h17
1 files changed, 9 insertions, 8 deletions
diff --git a/include/asm-arm/arch-ixp2000/system.h b/include/asm-arm/arch-ixp2000/system.h
index d9d6d9d07e0..ddbbb34b5f9 100644
--- a/include/asm-arm/arch-ixp2000/system.h
+++ b/include/asm-arm/arch-ixp2000/system.h
@@ -26,23 +26,24 @@ static inline void arch_reset(char mode)
* RedBoot bank.
*/
if (machine_is_ixdp2401()) {
- *IXDP2X01_CPLD_FLASH_REG = ((0 >> IXDP2X01_FLASH_WINDOW_BITS)
- | IXDP2X01_CPLD_FLASH_INTERN);
- *IXDP2X01_CPLD_RESET_REG = 0xffffffff;
+ ixp2000_reg_write(IXDP2X01_CPLD_FLASH_REG,
+ ((0 >> IXDP2X01_FLASH_WINDOW_BITS)
+ | IXDP2X01_CPLD_FLASH_INTERN));
+ ixp2000_reg_wrb(IXDP2X01_CPLD_RESET_REG, 0xffffffff);
}
/*
* On IXDP2801 we need to write this magic sequence to the CPLD
* to cause a complete reset of the CPU and all external devices
- * and moves the flash bank register back to 0.
+ * and move the flash bank register back to 0.
*/
if (machine_is_ixdp2801()) {
unsigned long reset_reg = *IXDP2X01_CPLD_RESET_REG;
+
reset_reg = 0x55AA0000 | (reset_reg & 0x0000FFFF);
- *IXDP2X01_CPLD_RESET_REG = reset_reg;
- mb();
- *IXDP2X01_CPLD_RESET_REG = 0x80000000;
+ ixp2000_reg_write(IXDP2X01_CPLD_RESET_REG, reset_reg);
+ ixp2000_reg_wrb(IXDP2X01_CPLD_RESET_REG, 0x80000000);
}
- *IXP2000_RESET0 = RSTALL;
+ ixp2000_reg_wrb(IXP2000_RESET0, RSTALL);
}