109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
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/*
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* Serial port stubs for kernel decompress status messages
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*
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* Initially based on:
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* arch/arm/plat-omap/include/mach/uncompress.h
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*
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* Original copyrights follow.
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*
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* Copyright (C) 2000 RidgeRun, Inc.
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* Author: Greg Lonnon <glonnon@ridgerun.com>
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*
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* Rewritten by:
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* Author: <source@mvista.com>
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* 2004 (c) MontaVista Software, Inc.
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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#include <linux/types.h>
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#include <linux/serial_reg.h>
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#include <asm/mach-types.h>
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#include <mach/serial.h>
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#define IOMEM(x) ((void __force __iomem *)(x))
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u32 *uart;
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/* PORT_16C550A, in polled non-fifo mode */
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static void putc(char c)
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{
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while (!(uart[UART_LSR] & UART_LSR_THRE))
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barrier();
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uart[UART_TX] = c;
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}
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static inline void flush(void)
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{
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while (!(uart[UART_LSR] & UART_LSR_THRE))
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barrier();
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}
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static inline void set_uart_info(u32 phys, void * __iomem virt)
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{
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/*
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* Get address of some.bss variable and round it down
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* a la CONFIG_AUTO_ZRELADDR.
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*/
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u32 ram_start = (u32)&uart & 0xf8000000;
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u32 *uart_info = (u32 *)(ram_start + DAVINCI_UART_INFO_OFS);
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uart = (u32 *)phys;
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uart_info[0] = phys;
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uart_info[1] = (u32)virt;
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}
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#define _DEBUG_LL_ENTRY(machine, phys, virt) \
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if (machine_is_##machine()) { \
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set_uart_info(phys, virt); \
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break; \
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}
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#define DEBUG_LL_DAVINCI(machine, port) \
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_DEBUG_LL_ENTRY(machine, DAVINCI_UART##port##_BASE, \
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IO_ADDRESS(DAVINCI_UART##port##_BASE))
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#define DEBUG_LL_DA8XX(machine, port) \
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_DEBUG_LL_ENTRY(machine, DA8XX_UART##port##_BASE, \
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IO_ADDRESS(DA8XX_UART##port##_BASE))
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#define DEBUG_LL_TNETV107X(machine, port) \
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_DEBUG_LL_ENTRY(machine, TNETV107X_UART##port##_BASE, \
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TNETV107X_UART##port##_VIRT)
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static inline void __arch_decomp_setup(unsigned long arch_id)
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{
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/*
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* Initialize the port based on the machine ID from the bootloader.
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* Note that we're using macros here instead of switch statement
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* as machine_is functions are optimized out for the boards that
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* are not selected.
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*/
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do {
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/* Davinci boards */
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DEBUG_LL_DAVINCI(davinci_evm, 0);
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DEBUG_LL_DAVINCI(sffsdr, 0);
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DEBUG_LL_DAVINCI(neuros_osd2, 0);
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DEBUG_LL_DAVINCI(davinci_dm355_evm, 0);
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DEBUG_LL_DAVINCI(dm355_leopard, 0);
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DEBUG_LL_DAVINCI(davinci_dm6467_evm, 0);
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DEBUG_LL_DAVINCI(davinci_dm365_evm, 0);
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/* DA8xx boards */
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DEBUG_LL_DA8XX(davinci_da830_evm, 2);
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DEBUG_LL_DA8XX(davinci_da850_evm, 2);
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DEBUG_LL_DA8XX(mityomapl138, 1);
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DEBUG_LL_DA8XX(omapl138_hawkboard, 2);
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/* TNETV107x boards */
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DEBUG_LL_TNETV107X(tnetv107x, 1);
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} while (0);
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}
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#define arch_decomp_setup() __arch_decomp_setup(arch_id)
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#define arch_decomp_wdog()
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