This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / arm / mach-s3c2410 / cpu.c

diff --git a/arch/arm/mach-s3c2410/cpu.c b/arch/arm/mach-s3c2410/cpu.c
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+++ b/arch/arm/mach-s3c2410/cpu.c
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+/* linux/arch/arm/mach-s3c2410/cpu.c
+ *
+ * Copyright (c) 2004 Simtec Electronics
+ * Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C24XX CPU Support
+ *
+ * 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
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+
+#include <asm/hardware.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/delay.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#include <asm/arch/regs-gpio.h>
+
+#include "cpu.h"
+#include "s3c2410.h"
+#include "s3c2440.h"
+
+struct cpu_table {
+       unsigned long   idcode;
+       unsigned long   idmask;
+       void            (*map_io)(struct map_desc *mach_desc, int size);
+       int             (*init)(void);
+       const char      *name;
+};
+
+/* table of supported CPUs */
+
+static const char name_s3c2410[]  = "S3C2410";
+static const char name_s3c2440[]  = "S3C2440";
+static const char name_s3c2410a[] = "S3C2410A";
+static const char name_s3c2440a[] = "S3C2440A";
+
+static struct cpu_table cpu_ids[] __initdata = {
+       {
+               .idcode = 0x32410000,
+               .idmask = 0xffffffff,
+               .map_io = s3c2410_map_io,
+               .init   = s3c2410_init,
+               .name   = name_s3c2410
+       },
+       {
+               .idcode = 0x3241002,
+               .idmask = 0xffffffff,
+               .map_io = s3c2410_map_io,
+               .init   = s3c2410_init,
+               .name   = name_s3c2410a
+       },
+       {
+               .idcode = 0x32440000,
+               .idmask = 0xffffffff,
+               .map_io = s3c2440_map_io,
+               .init   = s3c2440_init,
+               .name   = name_s3c2440
+       },
+       {
+               .idcode = 0x32440001,
+               .idmask = 0xffffffff,
+               .map_io = s3c2440_map_io,
+               .init   = s3c2440_init,
+               .name   = name_s3c2440a
+       }
+};
+
+/* minimal IO mapping */
+
+static struct map_desc s3c_iodesc[] __initdata = {
+       IODESC_ENT(GPIO),
+       IODESC_ENT(IRQ),
+       IODESC_ENT(MEMCTRL),
+       IODESC_ENT(UART)
+};
+
+
+static struct cpu_table *
+s3c_lookup_cpu(unsigned long idcode)
+{
+       struct cpu_table *tab;
+       int count;
+
+       tab = cpu_ids;
+       for (count = 0; count < ARRAY_SIZE(cpu_ids); count++) {
+               if ((idcode & tab->idmask) == tab->idcode)
+                       return tab;
+       }
+
+       return NULL;
+}
+
+static struct cpu_table *cpu;
+
+void __init s3c24xx_init_io(struct map_desc *mach_desc, int size)
+{
+       unsigned long idcode;
+
+       /* initialise the io descriptors we need for initialisation */
+       iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
+
+       idcode = __raw_readl(S3C2410_GSTATUS1);
+       cpu = s3c_lookup_cpu(idcode);
+
+       if (cpu == NULL) {
+               printk(KERN_ERR "Unknown CPU type 0x%08lx\n", idcode);
+               panic("Unknown S3C24XX CPU");
+       }
+
+       if (cpu->map_io == NULL || cpu->init == NULL) {
+               printk(KERN_ERR "CPU %s support not enabled\n", cpu->name);
+               panic("Unsupported S3C24XX CPU");
+       }
+
+       printk("CPU %s (id 0x%08lx)\n", cpu->name, idcode);
+
+       (cpu->map_io)(mach_desc, size);
+}
+
+static int __init s3c_arch_init(void)
+{
+       // do the correct init for cpu
+
+       if (cpu == NULL)
+               panic("s3c_arch_init: NULL cpu\n");
+
+       return (cpu->init)();
+}
+
+arch_initcall(s3c_arch_init);