1 files changed, 158 insertions, 0 deletions

diff --git a/include/asm-arm/arch-s3c2410/uncompress.h b/include/asm-arm/arch-s3c2410/uncompress.h
new file mode 100644
index 000000000000..ad4252e27799
--- /dev/null
+++ b/include/asm-arm/arch-s3c2410/uncompress.h
@@ -0,0 +1,158 @@
+/* linux/include/asm-arm/arch-s3c2410/uncompress.h
+ *
+ * (c) 2003 Simtec Electronics
+ *    Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C2410 - uncompress code
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Changelog:
+ *  22-May-2003 BJD  Created
+ *  08-Sep-2003 BJD  Moved to linux v2.6
+ *  12-Mar-2004 BJD  Updated header protection
+ *  12-Oct-2004 BJD  Take account of debug uart configuration
+ *  15-Nov-2004 BJD  Fixed uart configuration
+ *  22-Feb-2005 BJD  Added watchdog to uncompress
+*/
+
+#ifndef __ASM_ARCH_UNCOMPRESS_H
+#define __ASM_ARCH_UNCOMPRESS_H
+
+#include <linux/config.h>
+
+/* defines for UART registers */
+#include "asm/arch/regs-serial.h"
+#include "asm/arch/regs-gpio.h"
+#include "asm/arch/regs-watchdog.h"
+
+#include <asm/arch/map.h>
+
+/* working in physical space... */
+#undef S3C2410_GPIOREG
+#undef S3C2410_WDOGREG
+
+#define S3C2410_GPIOREG(x) ((S3C2410_PA_GPIO + (x)))
+#define S3C2410_WDOGREG(x) ((S3C2410_PA_WATCHDOG + (x)))
+
+/* how many bytes we allow into the FIFO at a time in FIFO mode */
+#define FIFO_MAX         (14)
+
+#define uart_base S3C2410_PA_UART + (0x4000*CONFIG_S3C2410_LOWLEVEL_UART_PORT)
+
+static __inline__ void
+uart_wr(unsigned int reg, unsigned int val)
+{
+        volatile unsigned int *ptr;
+
+        ptr = (volatile unsigned int *)(reg + uart_base);
+        *ptr = val;
+}
+
+static __inline__ unsigned int
+uart_rd(unsigned int reg)
+{
+        volatile unsigned int *ptr;
+
+        ptr = (volatile unsigned int *)(reg + uart_base);
+        return *ptr;
+}
+
+
+/* we can deal with the case the UARTs are being run
+ * in FIFO mode, so that we don't hold up our execution
+ * waiting for tx to happen...
+*/
+
+static void
+putc(char ch)
+{
+        int cpuid = *((volatile unsigned int *)S3C2410_GSTATUS1);
+
+        cpuid &= S3C2410_GSTATUS1_IDMASK;
+
+        if (ch == '\n')
+                putc('\r');    /* expand newline to \r\n */
+
+        if (uart_rd(S3C2410_UFCON) & S3C2410_UFCON_FIFOMODE) {
+                int level;
+
+                while (1) {
+                        level = uart_rd(S3C2410_UFSTAT);
+
+                        if (cpuid == S3C2410_GSTATUS1_2440) {
+                                level &= S3C2440_UFSTAT_TXMASK;
+                                level >>= S3C2440_UFSTAT_TXSHIFT;
+                        } else {
+                                level &= S3C2410_UFSTAT_TXMASK;
+                                level >>= S3C2410_UFSTAT_TXSHIFT;
+                        }
+
+                        if (level < FIFO_MAX)
+                                break;
+                }
+
+        } else {
+                /* not using fifos */
+
+                while ((uart_rd(S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE) != S3C2410_UTRSTAT_TXE);
+        }
+
+        /* write byte to transmission register */
+        uart_wr(S3C2410_UTXH, ch);
+}
+
+static void
+putstr(const char *ptr)
+{
+        for (; *ptr != '\0'; ptr++) {
+                putc(*ptr);
+        }
+}
+
+/* CONFIG_S3C2410_BOOT_WATCHDOG
+ *
+ * Simple boot-time watchdog setup, to reboot the system if there is
+ * any problem with the boot process
+*/
+
+#ifdef CONFIG_S3C2410_BOOT_WATCHDOG
+
+#define WDOG_COUNT (0xff00)
+
+#define __raw_writel(d,ad) do { *((volatile unsigned int *)(ad)) = (d); } while(0)
+
+static inline void arch_decomp_wdog(void)
+{
+        __raw_writel(WDOG_COUNT, S3C2410_WTCNT);
+}
+
+static void arch_decomp_wdog_start(void)
+{
+        __raw_writel(WDOG_COUNT, S3C2410_WTDAT);
+        __raw_writel(WDOG_COUNT, S3C2410_WTCNT);
+        __raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128 | S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x40), S3C2410_WTCON);
+}
+
+#else
+#define arch_decomp_wdog_start()
+#define arch_decomp_wdog()
+#endif
+
+static void error(char *err);
+
+static void
+arch_decomp_setup(void)
+{
+        /* we may need to setup the uart(s) here if we are not running
+         * on an BAST... the BAST will have left the uarts configured
+         * after calling linux.
+         */
+
+        arch_decomp_wdog_start();
+}
+
+
+#endif /* __ASM_ARCH_UNCOMPRESS_H */