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477099f189
Apart from the necessity to do this change for multi-platform kernels the previous logic depended on the zImage decompressor to write the physical and virtual address to a magic memory location. If the decompressor is unused or not correctly configured for the current machid, the addruart macro was an infinite loop. Moreover debugging the early zImage code was not possible either. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> [nsekhar@ti.com: add braces in _DEBUG_LL_ENTRY() macro to fix checkpatch error. Fix debug port choice config dependency for traditional DaVincis. Modify debug port config names and add help text.] Signed-off-by: Sekhar Nori <nsekhar@ti.com>
99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/*
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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)
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{
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uart = (u32 *)phys;
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}
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#define _DEBUG_LL_ENTRY(machine, phys) \
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{ \
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if (machine_is_##machine()) { \
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set_uart_info(phys); \
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break; \
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} \
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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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#define DEBUG_LL_DA8XX(machine, port) \
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_DEBUG_LL_ENTRY(machine, 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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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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