| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | /* |
| 3 | * arch/arm/mach-ixp4xx/include/mach/uncompress.h |
| 4 | * |
| 5 | * Copyright (C) 2002 Intel Corporation. |
| 6 | * Copyright (C) 2003-2004 MontaVista Software, Inc. |
| 7 | */ |
| 8 | |
| 9 | #ifndef _ARCH_UNCOMPRESS_H_ |
| 10 | #define _ARCH_UNCOMPRESS_H_ |
| 11 | |
| 12 | #include "ixp4xx-regs.h" |
| 13 | #include <asm/mach-types.h> |
| 14 | #include <linux/serial_reg.h> |
| 15 | |
| 16 | #define TX_DONE (UART_LSR_TEMT|UART_LSR_THRE) |
| 17 | |
| 18 | volatile u32* uart_base; |
| 19 | |
| 20 | static inline void putc(int c) |
| 21 | { |
| 22 | /* Check THRE and TEMT bits before we transmit the character. |
| 23 | */ |
| 24 | while ((uart_base[UART_LSR] & TX_DONE) != TX_DONE) |
| 25 | barrier(); |
| 26 | |
| 27 | *uart_base = c; |
| 28 | } |
| 29 | |
| 30 | static void flush(void) |
| 31 | { |
| 32 | } |
| 33 | |
| 34 | static __inline__ void __arch_decomp_setup(unsigned long arch_id) |
| 35 | { |
| 36 | /* |
| 37 | * Some boards are using UART2 as console |
| 38 | */ |
| 39 | if (machine_is_adi_coyote() || machine_is_gtwx5715() || |
| 40 | machine_is_gateway7001() || machine_is_wg302v2() || |
| 41 | machine_is_devixp() || machine_is_miccpt() || machine_is_mic256()) |
| 42 | uart_base = (volatile u32*) IXP4XX_UART2_BASE_PHYS; |
| 43 | else |
| 44 | uart_base = (volatile u32*) IXP4XX_UART1_BASE_PHYS; |
| 45 | } |
| 46 | |
| 47 | /* |
| 48 | * arch_id is a variable in decompress_kernel() |
| 49 | */ |
| 50 | #define arch_decomp_setup() __arch_decomp_setup(arch_id) |
| 51 | |
| 52 | #endif |