Commit | Line | Data |
---|---|---|
e7736d47 LB |
1 | /* |
2 | * linux/include/asm-arm/arch-ep93xx/uncompress.h | |
3 | * | |
4 | * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> | |
5 | * | |
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. | |
10 | */ | |
11 | ||
12 | #include <asm/arch/ep93xx-regs.h> | |
13 | ||
14 | static unsigned char __raw_readb(unsigned int ptr) | |
15 | { | |
16 | return *((volatile unsigned char *)ptr); | |
17 | } | |
18 | ||
c9b4470e LB |
19 | static unsigned int __raw_readl(unsigned int ptr) |
20 | { | |
21 | return *((volatile unsigned int *)ptr); | |
22 | } | |
23 | ||
e7736d47 LB |
24 | static void __raw_writeb(unsigned char value, unsigned int ptr) |
25 | { | |
26 | *((volatile unsigned char *)ptr) = value; | |
27 | } | |
28 | ||
c9b4470e LB |
29 | static void __raw_writel(unsigned int value, unsigned int ptr) |
30 | { | |
31 | *((volatile unsigned int *)ptr) = value; | |
32 | } | |
33 | ||
e7736d47 LB |
34 | |
35 | #define PHYS_UART1_DATA 0x808c0000 | |
36 | #define PHYS_UART1_FLAG 0x808c0018 | |
37 | #define UART1_FLAG_TXFF 0x20 | |
38 | ||
a081568d | 39 | static inline void putc(int c) |
e7736d47 LB |
40 | { |
41 | int i; | |
42 | ||
43 | for (i = 0; i < 1000; i++) { | |
44 | /* Transmit fifo not full? */ | |
45 | if (!(__raw_readb(PHYS_UART1_FLAG) & UART1_FLAG_TXFF)) | |
46 | break; | |
47 | } | |
48 | ||
49 | __raw_writeb(c, PHYS_UART1_DATA); | |
50 | } | |
51 | ||
a081568d | 52 | static inline void flush(void) |
e7736d47 | 53 | { |
e7736d47 LB |
54 | } |
55 | ||
c9b4470e LB |
56 | |
57 | /* | |
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. | |
62 | */ | |
63 | #define PHYS_ETH_SELF_CTL 0x80010020 | |
64 | #define ETH_SELF_CTL_RESET 0x00000001 | |
65 | ||
66 | static void ethernet_reset(void) | |
67 | { | |
68 | unsigned int v; | |
69 | ||
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); | |
73 | ||
74 | /* Wait for reset to finish. */ | |
75 | while (__raw_readl(PHYS_ETH_SELF_CTL) & ETH_SELF_CTL_RESET) | |
76 | ; | |
77 | } | |
78 | ||
79 | ||
80 | static void arch_decomp_setup(void) | |
81 | { | |
82 | ethernet_reset(); | |
83 | } | |
84 | ||
e7736d47 | 85 | #define arch_decomp_wdog() |