2 * linux/include/asm-arm/arch-ep93xx/uncompress.h
4 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or (at
9 * your option) any later version.
12 #include <asm/arch/ep93xx-regs.h>
14 static unsigned char __raw_readb(unsigned int ptr)
16 return *((volatile unsigned char *)ptr);
19 static unsigned int __raw_readl(unsigned int ptr)
21 return *((volatile unsigned int *)ptr);
24 static void __raw_writeb(unsigned char value, unsigned int ptr)
26 *((volatile unsigned char *)ptr) = value;
29 static void __raw_writel(unsigned int value, unsigned int ptr)
31 *((volatile unsigned int *)ptr) = value;
35 #define PHYS_UART1_DATA 0x808c0000
36 #define PHYS_UART1_FLAG 0x808c0018
37 #define UART1_FLAG_TXFF 0x20
39 static inline void putc(int c)
43 for (i = 0; i < 1000; i++) {
44 /* Transmit fifo not full? */
45 if (!(__raw_readb(PHYS_UART1_FLAG) & UART1_FLAG_TXFF))
49 __raw_writeb(c, PHYS_UART1_DATA);
52 static inline void flush(void)
58 * Some bootloaders don't turn off DMA from the ethernet MAC before
59 * jumping to linux, which means that we might end up with bits of RX
60 * status and packet data scribbled over the uncompressed kernel image.
61 * Work around this by resetting the ethernet MAC before we uncompress.
63 #define PHYS_ETH_SELF_CTL 0x80010020
64 #define ETH_SELF_CTL_RESET 0x00000001
66 static void ethernet_reset(void)
70 /* Reset the ethernet MAC. */
71 v = __raw_readl(PHYS_ETH_SELF_CTL);
72 __raw_writel(v | ETH_SELF_CTL_RESET, PHYS_ETH_SELF_CTL);
74 /* Wait for reset to finish. */
75 while (__raw_readl(PHYS_ETH_SELF_CTL) & ETH_SELF_CTL_RESET)
80 static void arch_decomp_setup(void)
85 #define arch_decomp_wdog()