| Russell King | a09e64f | 2008-08-05 16:14:15 +0100 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-sa1100/include/mach/uncompress.h |
| 3 | * |
| 4 | * (C) 1999 Nicolas Pitre <nico@cam.org> |
| 5 | * |
| 6 | * Reorganised to be machine independent. |
| 7 | */ |
| 8 | |
| 9 | #include "hardware.h" |
| 10 | |
| 11 | /* |
| 12 | * The following code assumes the serial port has already been |
| 13 | * initialized by the bootloader. We search for the first enabled |
| 14 | * port in the most probable order. If you didn't setup a port in |
| 15 | * your bootloader then nothing will appear (which might be desired). |
| 16 | */ |
| 17 | |
| 18 | #define UART(x) (*(volatile unsigned long *)(serial_port + (x))) |
| 19 | |
| 20 | static void putc(int c) |
| 21 | { |
| 22 | unsigned long serial_port; |
| 23 | |
| 24 | do { |
| 25 | serial_port = _Ser3UTCR0; |
| 26 | if (UART(UTCR3) & UTCR3_TXE) break; |
| 27 | serial_port = _Ser1UTCR0; |
| 28 | if (UART(UTCR3) & UTCR3_TXE) break; |
| 29 | serial_port = _Ser2UTCR0; |
| 30 | if (UART(UTCR3) & UTCR3_TXE) break; |
| 31 | return; |
| 32 | } while (0); |
| 33 | |
| 34 | /* wait for space in the UART's transmitter */ |
| 35 | while (!(UART(UTSR1) & UTSR1_TNF)) |
| 36 | barrier(); |
| 37 | |
| 38 | /* send the character out. */ |
| 39 | UART(UTDR) = c; |
| 40 | } |
| 41 | |
| 42 | static inline void flush(void) |
| 43 | { |
| 44 | } |
| 45 | |
| 46 | /* |
| 47 | * Nothing to do for these |
| 48 | */ |
| 49 | #define arch_decomp_setup() |
| 50 | #define arch_decomp_wdog() |