112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
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/*
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*
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* BRIEF MODULE DESCRIPTION
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* PROM library initialisation code, supports YAMON and U-Boot.
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*
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* Copyright 2000, 2001, 2006 MontaVista Software Inc.
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* Author: MontaVista Software, Inc.
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* ppopov@mvista.com or source@mvista.com
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*
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* This file was derived from Carsten Langgaard's
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* arch/mips/mips-boards/xx files.
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*
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* Carsten Langgaard, carstenl@mips.com
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* Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/string.h>
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#include <asm/bootinfo.h>
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#include <asm/mach-jz4740/regs.h>
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/* #define DEBUG_CMDLINE */
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int prom_argc;
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char **prom_argv, **prom_envp;
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char *prom_getcmdline(void)
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{
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return &(arcs_cmdline[0]);
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}
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void prom_init_cmdline(void)
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{
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char *cp, *c;
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size_t i = 1;
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cp = &(arcs_cmdline[0]);
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while(i < prom_argc) {
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c = prom_argv[i];
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while (*c) {
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*cp++ = *c++;
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}
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*cp++ = ' ';
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i++;
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}
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if (i > 1) {
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*(cp - 1) = '\0';
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}
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}
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void __init prom_init(void)
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{
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unsigned long memsize;
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prom_argc = (int) fw_arg0;
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prom_argv = (char **) fw_arg1;
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prom_envp = (char **) fw_arg2;
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mips_machtype = MACH_INGENIC_JZ4740;
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prom_init_cmdline();
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memsize = 0x04000000;
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add_memory_region(0, memsize, BOOT_MEM_RAM);
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}
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void __init prom_free_prom_memory(void)
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{
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}
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/* used by early printk */
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void prom_putchar(char c)
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{
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volatile u8 *uart_lsr = (volatile u8 *)(UART0_BASE + OFF_LSR);
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volatile u8 *uart_tdr = (volatile u8 *)(UART0_BASE + OFF_TDR);
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/* Wait for fifo to shift out some bytes */
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while ( !((*uart_lsr & (UARTLSR_TDRQ | UARTLSR_TEMT)) == 0x60) );
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*uart_tdr = (u8)c;
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}
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const char *get_system_type(void)
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{
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return "JZ4740";
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}
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EXPORT_SYMBOL(prom_getcmdline);
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