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| author | Michal Simek <monstr@monstr.eu> | 2012-03-30 12:10:03 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2012-03-30 12:10:03 +0200 |
| commit | 6a4770e335bd4df0a4577146f76e116ab6e23f40 (patch) | |
| tree | 305056c20b6ccf3a4fed00e9e32f3a1dd039cd70 /arch/arm/mach-vexpress/include/mach/uncompress.h | |
| parent | microblaze: Fix stack usage in PAGE_SIZE copy_tofrom_user (diff) | |
| parent | Merge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh (diff) | |
| download | linux-6a4770e335bd4df0a4577146f76e116ab6e23f40.tar.xz linux-6a4770e335bd4df0a4577146f76e116ab6e23f40.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into next
Diffstat (limited to 'arch/arm/mach-vexpress/include/mach/uncompress.h')
| -rw-r--r-- | arch/arm/mach-vexpress/include/mach/uncompress.h | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/arm/mach-vexpress/include/mach/uncompress.h b/arch/arm/mach-vexpress/include/mach/uncompress.h index 7972c5748d0e..7dab5596b868 100644 --- a/arch/arm/mach-vexpress/include/mach/uncompress.h +++ b/arch/arm/mach-vexpress/include/mach/uncompress.h @@ -22,7 +22,27 @@ #define AMBA_UART_CR(base) (*(volatile unsigned char *)((base) + 0x30)) #define AMBA_UART_FR(base) (*(volatile unsigned char *)((base) + 0x18)) -#define get_uart_base() (0x10000000 + 0x00009000) +#define UART_BASE 0x10009000 +#define UART_BASE_RS1 0x1c090000 + +static unsigned long get_uart_base(void) +{ + unsigned long mpcore_periph; + + /* + * Make an educated guess regarding the memory map: + * - the original A9 core tile, which has MPCore peripherals + * located at 0x1e000000, should use UART at 0x10009000 + * - all other (RS1 complaint) tiles use UART mapped + * at 0x1c090000 + */ + asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (mpcore_periph)); + + if (mpcore_periph == 0x1e000000) + return UART_BASE; + else + return UART_BASE_RS1; +} /* * This does not append a newline |