158 lines
3.8 KiB
C
158 lines
3.8 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) 2005 Wu Qi Ming infineon
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* Copyright (C) 2007 John Crispin <blogic@openwrt.org>
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/bootmem.h>
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#include <asm/bootinfo.h>
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#include <ifxmips.h>
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static char buf[1024]; /* for prom_printf() */
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/* for voice cpu (MIPS24K) */
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unsigned int *prom_cp1_base;
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unsigned int prom_cp1_size;
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/* for Multithreading (APRP) on MIPS34K */
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unsigned long physical_memsize;
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/* early printk on asc0 or asc1 ? */
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#ifdef CONFIG_IFXMIPS_PROM_ASC0
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#define IFXMIPS_ASC_DIFF 0
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#else
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#define IFXMIPS_ASC_DIFF IFXMIPS_ASC_BASE_DIFF
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#endif
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static inline u32 asc_r32(unsigned long r)
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{
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return ifxmips_r32((u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
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}
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static inline void asc_w32(u32 v, unsigned long r)
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{
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ifxmips_w32(v, (u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
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}
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void prom_free_prom_memory(void)
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{
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}
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void prom_putchar(char c)
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{
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unsigned long flags;
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local_irq_save(flags);
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while ((asc_r32(IFXMIPS_ASC_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF)
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;
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if (c == '\n')
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asc_w32('\r', IFXMIPS_ASC_TBUF);
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asc_w32(c, IFXMIPS_ASC_TBUF);
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local_irq_restore(flags);
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}
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void prom_printf(const char *fmt, ...)
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{
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va_list args;
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int l;
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char *p, *buf_end;
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va_start(args, fmt);
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l = vsprintf(buf, fmt, args);
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va_end(args);
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buf_end = buf + l;
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for (p = buf; p < buf_end; p++)
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prom_putchar(*p);
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}
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unsigned int *prom_get_cp1_base(void)
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{
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return prom_cp1_base;
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}
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EXPORT_SYMBOL(prom_get_cp1_base);
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unsigned int prom_get_cp1_size(void)
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{
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/* return size im MB */
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return prom_cp1_size>>20;
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}
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EXPORT_SYMBOL(prom_get_cp1_size);
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void __init prom_init(void)
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{
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int argc = fw_arg0;
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char **argv = (char **) fw_arg1;
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char **envp = (char **) fw_arg2;
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int memsize = 16; /* assume 16M as default */
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int i;
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mips_machtype = MACH_INFINEON_IFXMIPS;
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if (argc) {
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argv = (char **)KSEG1ADDR((unsigned long)argv);
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arcs_cmdline[0] = '\0';
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for (i = 1; i < argc; i++) {
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char *a = (char *)KSEG1ADDR(argv[i]);
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if (!argv[i])
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continue;
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/* for voice cpu on Twinpass/Danube */
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if (cpu_data[0].cputype == CPU_24K)
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if (!strncmp(a, "cp1_size=", 9)) {
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prom_cp1_size = memparse(a + 9, &a);
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continue;
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}
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if (strlen(arcs_cmdline) + strlen(a + 1) >= sizeof(arcs_cmdline)) {
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prom_printf("cmdline overflow, skipping: %s\n", a);
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break;
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}
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strcat(arcs_cmdline, a);
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strcat(arcs_cmdline, " ");
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}
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if (!*arcs_cmdline)
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strcpy(&(arcs_cmdline[0]),
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"console=ttyS0,115200 rootfstype=squashfs,jffs2");
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}
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envp = (char **)KSEG1ADDR((unsigned long)envp);
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while (*envp) {
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char *e = (char *)KSEG1ADDR(*envp);
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if (!strncmp(e, "memsize=", 8)) {
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e += 8;
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memsize = simple_strtoul(e, NULL, 10);
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}
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envp++;
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}
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memsize *= 1024 * 1024;
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/* only on Twinpass/Danube a second CPU is used for Voice */
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if ((cpu_data[0].cputype == CPU_24K) && (prom_cp1_size)) {
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memsize -= prom_cp1_size;
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prom_cp1_base = (unsigned int *)KSEG1ADDR(memsize);
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prom_printf("Using %dMB Ram and reserving %dMB for cp1\n",
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memsize>>20, prom_cp1_size>>20);
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}
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add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
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}
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