make selection of ASC for prom working

[openwrt/staging/wigyori.git] / target / linux / ifxmips / files / arch / mips / ifxmips / prom.c

diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/prom.c b/target/linux/ifxmips/files/arch/mips/ifxmips/prom.c
index 95630ae368bb5b899a282c24267a7cba64887dad..9fbd4e457edf580a1f005c3ab7df26ec3d08b6c4 100644 (file)
--- a/target/linux/ifxmips/files/arch/mips/ifxmips/prom.c
+++ b/target/linux/ifxmips/files/arch/mips/ifxmips/prom.c
@@ -14,51 +14,59 @@
  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
  *
  *   Copyright (C) 2005 Wu Qi Ming infineon
- *   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];
-unsigned int *prom_cp1_base = NULL;
-unsigned int prom_cp1_size = 0;
+static char buf[1024]; /* for prom_printf() */
 
-static inline u32
-asc_r32(unsigned long r)
+/* 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_BASE_DIFF + r));
+       return ifxmips_r32((u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
 }
 
-static inline void
-asc_w32(u32 v, unsigned long r)
+static inline void asc_w32(u32 v, unsigned long r)
 {
-       ifxmips_w32(v, (u32*)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_BASE_DIFF + r));
+       ifxmips_w32(v, (u32 *)(IFXMIPS_ASC_BASE_ADDR + IFXMIPS_ASC_DIFF + r));
 }
 
-void
-prom_free_prom_memory(void)
+void prom_free_prom_memory(void)
 {
 }
 
-void
-prom_putchar(char c)
+void prom_putchar(char c)
 {
        unsigned long flags;
 
        local_irq_save(flags);
-       while((asc_r32(IFXMIPS_ASC_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF);
+       while ((asc_r32(IFXMIPS_ASC_FSTAT) & ASCFSTAT_TXFFLMASK) >> ASCFSTAT_TXFFLOFF)
+               ;
 
-       if(c == '\n')
+       if (c == '\n')
                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;
@@ -69,7 +77,7 @@ prom_printf(const char * fmt, ...)
        va_end(args);
        buf_end = buf + l;
 
-       for(p = buf; p < buf_end; p++)
+       for (p = buf; p < buf_end; p++)
                prom_putchar(*p);
 }
 
@@ -77,61 +85,70 @@ unsigned int *prom_get_cp1_base(void)
 {
        return prom_cp1_base;
 }
+EXPORT_SYMBOL(prom_get_cp1_base);
 
 unsigned int prom_get_cp1_size(void)
 {
-       return prom_cp1_size;
+       /* return size im MB */
+       return prom_cp1_size>>20;
 }
+EXPORT_SYMBOL(prom_get_cp1_size);
 
-void __init
-prom_init(void)
+void __init prom_init(void)
 {
        int argc = fw_arg0;
        char **argv = (char **) fw_arg1;
        char **envp = (char **) fw_arg2;
 
-       int memsize = 16;
+       int memsize = 16; /* assume 16M as default */
        int i;
 
        mips_machtype = MACH_INFINEON_IFXMIPS;
 
-       argv = (char**)KSEG1ADDR((unsigned long)argv);
-       arcs_cmdline[0] = '\0';
-       for(i = 1; i < argc; i++)
-       {
-               char *a = (char*)KSEG1ADDR(argv[i]);
-               if(!a)
-                       continue;
-               if(strlen(arcs_cmdline) + strlen(a + 1) >= sizeof(arcs_cmdline))
-                       break;
-               strcat(arcs_cmdline, a);
-               strcat(arcs_cmdline, " ");
+       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 init=/etc/preinit");
        }
+       envp = (char **)KSEG1ADDR((unsigned long)envp);
+       while (*envp) {
+               char *e = (char *)KSEG1ADDR(*envp);
 
-       envp = (char**)KSEG1ADDR((unsigned long)envp);
-       while(*envp)
-       {
-               char *e = (char*)KSEG1ADDR(*envp);
-
-               if(!strncmp(e, "memsize=", 8))
-               {
+               if (!strncmp(e, "memsize=", 8)) {
                        e += 8;
                        memsize = simple_strtoul(e, NULL, 10);
                }
                envp++;
        }
-
-       prom_cp1_size = 2;
-       memsize -= prom_cp1_size;
-       prom_cp1_base = (unsigned int*)(0xA0000000 + (memsize * 1024 * 1024));
-
-       prom_printf(KERN_INFO "Using %dMB Ram and reserving %dMB for cp1\n",
-               memsize, prom_cp1_size);
        memsize *= 1024 * 1024;
 
-       if(!*arcs_cmdline)
-               strcpy(&(arcs_cmdline[0]),
-                       "console=ttyS0,115200 rootfstype=squashfs,jffs2 init=/etc/preinit");
+       /* 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);
 }