83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
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/*
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* linux/include/asm-arm/arch-omap/uncompress.h
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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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* linux-2.4.15-rmk1-dsplinux1.6/include/asm-arm/arch-omap1510/uncompress.h
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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/config.h>
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#include <linux/types.h>
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#include <linux/serial_reg.h>
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#include <asm/arch/hardware.h>
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unsigned int system_rev;
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#define UART_OMAP_MDR1 0x08 /* mode definition register */
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#define OMAP_ID_730 0x355F
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#define ID_MASK 0x7fff
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#define check_port(base, shift) ((base[UART_OMAP_MDR1 << shift] & 7) == 0)
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#define omap_get_id() ((*(volatile unsigned int *)(0xfffed404)) >> 12) & ID_MASK
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static void
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putstr(const char *s)
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{
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volatile u8 * uart = 0;
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int shift;
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#ifdef CONFIG_OMAP_LL_DEBUG_UART3
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uart = (volatile u8 *)(OMAP_UART3_BASE);
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#elif CONFIG_OMAP_LL_DEBUG_UART2
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uart = (volatile u8 *)(OMAP_UART2_BASE);
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#else
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uart = (volatile u8 *)(OMAP_UART1_BASE);
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#endif
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/* Determine which serial port to use */
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do {
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/* MMU is not on, so cpu_is_omapXXXX() won't work here */
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unsigned int omap_id = omap_get_id();
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if (omap_id == OMAP_ID_730)
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shift = 0;
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else
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shift = 2;
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if (check_port(uart, shift))
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break;
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/* Silent boot if no serial ports are enabled. */
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return;
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} while (0);
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/*
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* Now, xmit each character
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*/
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while (*s) {
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while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
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barrier();
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uart[UART_TX << shift] = *s;
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if (*s++ == '\n') {
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while (!(uart[UART_LSR << shift] & UART_LSR_THRE))
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barrier();
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uart[UART_TX << shift] = '\r';
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}
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}
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}
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/*
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* nothing to do
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*/
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#define arch_decomp_setup()
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#define arch_decomp_wdog()
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