diff options
Diffstat (limited to 'arch/arm/mach-pxa/include/mach/uncompress.h')
| -rw-r--r-- | arch/arm/mach-pxa/include/mach/uncompress.h | 46 |
1 files changed, 39 insertions, 7 deletions
diff --git a/arch/arm/mach-pxa/include/mach/uncompress.h b/arch/arm/mach-pxa/include/mach/uncompress.h index 237734b5b1b..759b851ec98 100644 --- a/arch/arm/mach-pxa/include/mach/uncompress.h +++ b/arch/arm/mach-pxa/include/mach/uncompress.h @@ -10,20 +10,41 @@ */ #include <linux/serial_reg.h> -#include <mach/regs-uart.h> #include <asm/mach-types.h> -#define __REG(x) ((volatile unsigned long *)x) +#define FFUART_BASE (0x40100000) +#define BTUART_BASE (0x40200000) +#define STUART_BASE (0x40700000) -static volatile unsigned long *UART = FFUART; +static unsigned long uart_base; +static unsigned int uart_shift; +static unsigned int uart_is_pxa; + +static inline unsigned char uart_read(int offset) +{ + return *(volatile unsigned char *)(uart_base + (offset << uart_shift)); +} + +static inline void uart_write(unsigned char val, int offset) +{ + *(volatile unsigned char *)(uart_base + (offset << uart_shift)) = val; +} + +static inline int uart_is_enabled(void) +{ + /* assume enabled by default for non-PXA uarts */ + return uart_is_pxa ? uart_read(UART_IER) & UART_IER_UUE : 1; +} static inline void putc(char c) { - if (!(UART[UART_IER] & IER_UUE)) + if (!uart_is_enabled()) return; - while (!(UART[UART_LSR] & LSR_TDRQ)) + + while (!(uart_read(UART_LSR) & UART_LSR_THRE)) barrier(); - UART[UART_TX] = c; + + uart_write(c, UART_TX); } /* @@ -35,10 +56,21 @@ static inline void flush(void) static inline void arch_decomp_setup(void) { + /* initialize to default */ + uart_base = FFUART_BASE; + uart_shift = 2; + uart_is_pxa = 1; + if (machine_is_littleton() || machine_is_intelmote2() || machine_is_csb726() || machine_is_stargate2() || machine_is_cm_x300() || machine_is_balloon3()) - UART = STUART; + uart_base = STUART_BASE; + + if (machine_is_arcom_zeus()) { + uart_base = 0x10000000; /* nCS4 */ + uart_shift = 1; + uart_is_pxa = 0; + } } /* |