/*
- * arch/mips/ifxmips/prom.c
- *
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
* Copyright (C) 2005 Wu Qi Ming infineon
- *
- * Rewrite of Infineon IFXMips code, thanks to infineon for the support,
- * software and hardware
- *
- * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
- *
+ * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
*/
#include <linux/init.h>
+#include <linux/module.h>
#include <linux/bootmem.h>
#include <asm/bootinfo.h>
#include <asm/ifxmips/ifxmips.h>
-static char buf[1024];
+static char buf[1024]; /* for prom_printf() */
-void
-prom_free_prom_memory (void)
+/* for voice cpu (MIPS24K) */
+unsigned int *prom_cp1_base;
+unsigned int prom_cp1_size;
+
+/* for Multithreading (APRP) on MIPS34K */
+unsigned long physical_memsize;
+
+#ifdef CONFIG_IFXMIPS_PROM_ASC0
+#define IFXMIPS_ASC_DIFF 0
+#else
+#define IFXMIPS_ASC_DIFF IFXMIPS_ASC_BASE_DIFF
+#endif
+
+static inline u32 asc_r32(unsigned long r)
{
+ return ifxmips_r32((u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
}
-void
-prom_putchar (char c)
+static inline void asc_w32(u32 v, unsigned long r)
{
- while ((readl(IFXMIPS_ASC1_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF);
+ ifxmips_w32(v, (u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
+}
+
+void prom_free_prom_memory(void)
+{
+}
+
+void prom_putchar(char c)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+ while ((asc_r32(IFXMIPS_ASC_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF)
+ ;
if (c == '\n')
- writel('\r', IFXMIPS_ASC1_TBUF);
- writel(c, IFXMIPS_ASC1_TBUF);
+ asc_w32('\r', IFXMIPS_ASC_TBUF);
+ asc_w32(c, IFXMIPS_ASC_TBUF);
+ local_irq_restore(flags);
}
-void
-prom_printf (const char * fmt, ...)
+void prom_printf(const char *fmt, ...)
{
va_list args;
int l;
buf_end = buf + l;
for (p = buf; p < buf_end; p++)
- {
prom_putchar(*p);
- }
}
-void __init
-prom_init(void)
+unsigned int *prom_get_cp1_base(void)
{
- mips_machgroup = MACH_GROUP_IFXMIPS;
+ return prom_cp1_base;
+}
+EXPORT_SYMBOL(prom_get_cp1_base);
+
+unsigned int prom_get_cp1_size(void)
+{
+ /* return size im MB */
+ return prom_cp1_size>>20;
+}
+EXPORT_SYMBOL(prom_get_cp1_size);
+
+void __init prom_init(void)
+{
+ int argc = fw_arg0;
+ char **argv = (char **) fw_arg1;
+ char **envp = (char **) fw_arg2;
+
+ int memsize = 16; /* assume 16M as default */
+ int i;
+
mips_machtype = MACH_INFINEON_IFXMIPS;
- strcpy(&(arcs_cmdline[0]), "console=ttyS0,115200 rootfstype=squashfs,jffs2 init=/etc/preinit");
- add_memory_region (0x00000000, 0x2000000, BOOT_MEM_RAM);
+ if (argc) {
+ argv = (char **)KSEG1ADDR((unsigned long)argv);
+ arcs_cmdline[0] = '\0';
+ for (i = 1; i < argc; i++) {
+ char *a = (char *)KSEG1ADDR(argv[i]);
+ if (!argv[i])
+ continue;
+ /* for voice cpu on Twinpass/Danube */
+ if (cpu_data[0].cputype == CPU_24K)
+ if (!strncmp(a, "cp1_size=", 9)) {
+ prom_cp1_size = memparse(a + 9, &a);
+ continue;
+ }
+ if (strlen(arcs_cmdline) + strlen(a + 1) >= sizeof(arcs_cmdline)) {
+ prom_printf("cmdline overflow, skipping: %s\n", a);
+ break;
+ }
+ strcat(arcs_cmdline, a);
+ strcat(arcs_cmdline, " ");
+ }
+ if (!*arcs_cmdline)
+ strcpy(&(arcs_cmdline[0]),
+ "console=ttyS0,115200 rootfstype=squashfs,jffs2");
+ }
+ envp = (char **)KSEG1ADDR((unsigned long)envp);
+ while (*envp) {
+ char *e = (char *)KSEG1ADDR(*envp);
+
+ if (!strncmp(e, "memsize=", 8)) {
+ e += 8;
+ memsize = simple_strtoul(e, NULL, 10);
+ }
+ envp++;
+ }
+ memsize *= 1024 * 1024;
+
+ /* only on Twinpass/Danube a second CPU is used for Voice */
+ if ((cpu_data[0].cputype == CPU_24K) && (prom_cp1_size)) {
+ memsize -= prom_cp1_size;
+ prom_cp1_base = (unsigned int *)KSEG1ADDR(memsize);
+
+ prom_printf("Using %dMB Ram and reserving %dMB for cp1\n",
+ memsize>>20, prom_cp1_size>>20);
+ }
+
+ add_memory_region(0x00000000, memsize, BOOT_MEM_RAM);
}