From c94e4ad2d5e0e5f4036cccaa0e6e773841e8f859 Mon Sep 17 00:00:00 2001 From: Russell King Date: Fri, 19 Aug 2016 16:24:36 +0100 Subject: ARM: document and update UNCACHEABLE_ADDR definitions Document the UNCACHEABLE_ADDR definitions for footbridge and SA1100 so that we know where they're located and/or what they're accessing. Change RiscPC to calculate the UNCACHEABLE_ADDR value from FLUSH_BASE as that's where we locate that. UNCACHEABLE_ADDR is used to perform an uncached access (ARMv4 terminology) necessary to force a CPU clock-switch to the memory- speed clock, as required for entering WFI. Signed-off-by: Russell King --- arch/arm/mach-footbridge/include/mach/hardware.h | 2 +- arch/arm/mach-rpc/include/mach/hardware.h | 2 +- arch/arm/mach-sa1100/include/mach/hardware.h | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/arm') diff --git a/arch/arm/mach-footbridge/include/mach/hardware.h b/arch/arm/mach-footbridge/include/mach/hardware.h index 02f6d7a706b1..20d5ad781fe2 100644 --- a/arch/arm/mach-footbridge/include/mach/hardware.h +++ b/arch/arm/mach-footbridge/include/mach/hardware.h @@ -59,7 +59,7 @@ #define XBUS_SWITCH_J17_11 ((*XBUS_SWITCH) & (1 << 5)) #define XBUS_SWITCH_J17_9 ((*XBUS_SWITCH) & (1 << 6)) -#define UNCACHEABLE_ADDR (ARMCSR_BASE + 0x108) +#define UNCACHEABLE_ADDR (ARMCSR_BASE + 0x108) /* CSR_ROMBASEMASK */ /* PIC irq control */ diff --git a/arch/arm/mach-rpc/include/mach/hardware.h b/arch/arm/mach-rpc/include/mach/hardware.h index 257166b21f3d..aa79fa47373a 100644 --- a/arch/arm/mach-rpc/include/mach/hardware.h +++ b/arch/arm/mach-rpc/include/mach/hardware.h @@ -40,7 +40,7 @@ #define SCREEN_END 0xdfc00000 #define SCREEN_BASE 0xdf800000 -#define UNCACHEABLE_ADDR 0xdf010000 +#define UNCACHEABLE_ADDR (FLUSH_BASE + 0x10000) /* * IO Addresses diff --git a/arch/arm/mach-sa1100/include/mach/hardware.h b/arch/arm/mach-sa1100/include/mach/hardware.h index 55c85ce7010d..d944fd7e464f 100644 --- a/arch/arm/mach-sa1100/include/mach/hardware.h +++ b/arch/arm/mach-sa1100/include/mach/hardware.h @@ -13,7 +13,7 @@ #define __ASM_ARCH_HARDWARE_H -#define UNCACHEABLE_ADDR 0xfa050000 +#define UNCACHEABLE_ADDR 0xfa050000 /* ICIP */ /* -- cgit