| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * arch/arm/mach-sa1100/include/mach/uncompress.h |
| 4 | * |
| 5 | * (C) 1999 Nicolas Pitre <nico@fluxnic.net> |
| 6 | * |
| 7 | * Reorganised to be machine independent. |
| 8 | */ |
| 9 | |
| 10 | #include "hardware.h" |
| 11 | |
| 12 | #define IOMEM(x) (x) |
| 13 | |
| 14 | /* |
| 15 | * The following code assumes the serial port has already been |
| 16 | * initialized by the bootloader. We search for the first enabled |
| 17 | * port in the most probable order. If you didn't setup a port in |
| 18 | * your bootloader then nothing will appear (which might be desired). |
| 19 | */ |
| 20 | |
| 21 | #define UART(x) (*(volatile unsigned long *)(serial_port + (x))) |
| 22 | |
| 23 | static inline void putc(int c) |
| 24 | { |
| 25 | unsigned long serial_port; |
| 26 | |
| 27 | do { |
| 28 | serial_port = _Ser3UTCR0; |
| 29 | if (UART(UTCR3) & UTCR3_TXE) break; |
| 30 | serial_port = _Ser1UTCR0; |
| 31 | if (UART(UTCR3) & UTCR3_TXE) break; |
| 32 | serial_port = _Ser2UTCR0; |
| 33 | if (UART(UTCR3) & UTCR3_TXE) break; |
| 34 | return; |
| 35 | } while (0); |
| 36 | |
| 37 | /* wait for space in the UART's transmitter */ |
| 38 | while (!(UART(UTSR1) & UTSR1_TNF)) |
| 39 | barrier(); |
| 40 | |
| 41 | /* send the character out. */ |
| 42 | UART(UTDR) = c; |
| 43 | } |
| 44 | |
| 45 | static inline void flush(void) |
| 46 | { |
| 47 | } |
| 48 | |
| 49 | /* |
| 50 | * Nothing to do for these |
| 51 | */ |
| 52 | #define arch_decomp_setup() |