1 files changed, 184 insertions, 0 deletions
diff --git a/arch/arm/plat-samsung/include/plat/uncompress.h b/arch/arm/plat-samsung/include/plat/uncompress.h
new file mode 100644
index 000000000000..7d6ed7263d57
--- /dev/null
+++ b/arch/arm/plat-samsung/include/plat/uncompress.h
@@ -0,0 +1,184 @@
+/* arch/arm/plat-samsung/include/plat/uncompress.h
+ *
+ * Copyright 2003, 2007 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C - 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.
+*/
+
+#ifndef __ASM_PLAT_UNCOMPRESS_H
+#define __ASM_PLAT_UNCOMPRESS_H
+
+typedef unsigned int upf_t;	/* cannot include linux/serial_core.h */
+
+/* uart setup */
+
+static unsigned int fifo_mask;
+static unsigned int fifo_max;
+
+/* forward declerations */
+
+static void arch_detect_cpu(void);
+
+/* defines for UART registers */
+
+#include <plat/regs-serial.h>
+#include <plat/regs-watchdog.h>
+
+/* working in physical space... */
+#undef S3C2410_WDOGREG
+#define S3C2410_WDOGREG(x) ((S3C24XX_PA_WATCHDOG + (x)))
+
+/* how many bytes we allow into the FIFO at a time in FIFO mode */
+#define FIFO_MAX	 (14)
+
+#define uart_base S3C_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_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(int ch)
+{
+	if (uart_rd(S3C2410_UFCON) & S3C2410_UFCON_FIFOMODE) {
+		int level;
+
+		while (1) {
+			level = uart_rd(S3C2410_UFSTAT);
+			level &= fifo_mask;
+
+			if (level < fifo_max)
+				break;
+		}
+
+	} else {
+		/* not using fifos */
+
+		while ((uart_rd(S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE) != S3C2410_UTRSTAT_TXE)
+			barrier();
+	}
+
+	/* write byte to transmission register */
+	uart_wr(S3C2410_UTXH, ch);
+}
+
+static inline void flush(void)
+{
+}
+
+#define __raw_writel(d, ad)			\
+	do {							\
+		*((volatile unsigned int __force *)(ad)) = (d); \
+	} while (0)
+
+/* CONFIG_S3C_BOOT_WATCHDOG
+ *
+ * Simple boot-time watchdog setup, to reboot the system if there is
+ * any problem with the boot process
+*/
+
+#ifdef CONFIG_S3C_BOOT_WATCHDOG
+
+#define WDOG_COUNT (0xff00)
+
+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(0x80), S3C2410_WTCON);
+}
+
+#else
+#define arch_decomp_wdog_start()
+#define arch_decomp_wdog()
+#endif
+
+#ifdef CONFIG_S3C_BOOT_ERROR_RESET
+
+static void arch_decomp_error(const char *x)
+{
+	putstr("\n\n");
+	putstr(x);
+	putstr("\n\n -- System resetting\n");
+
+	__raw_writel(0x4000, S3C2410_WTDAT);
+	__raw_writel(0x4000, S3C2410_WTCNT);
+	__raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128 | S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x40), S3C2410_WTCON);
+
+	while(1);
+}
+
+#define arch_error arch_decomp_error
+#endif
+
+#ifdef CONFIG_S3C_BOOT_UART_FORCE_FIFO
+static inline void arch_enable_uart_fifo(void)
+{
+	u32 fifocon = uart_rd(S3C2410_UFCON);
+
+	if (!(fifocon & S3C2410_UFCON_FIFOMODE)) {
+		fifocon |= S3C2410_UFCON_RESETBOTH;
+		uart_wr(S3C2410_UFCON, fifocon);
+
+		/* wait for fifo reset to complete */
+		while (1) {
+			fifocon = uart_rd(S3C2410_UFCON);
+			if (!(fifocon & S3C2410_UFCON_RESETBOTH))
+				break;
+		}
+	}
+}
+#else
+#define arch_enable_uart_fifo() do { } while(0)
+#endif
+
+
+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_detect_cpu();
+	arch_decomp_wdog_start();
+
+	/* Enable the UART FIFOs if they where not enabled and our
+	 * configuration says we should turn them on.
+	 */
+
+	arch_enable_uart_fifo();
+}
+
+
+#endif /* __ASM_PLAT_UNCOMPRESS_H */