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a8b7e9e8 LPC |
1 | /* |
2 | * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> | |
3 | * JZ4740 SoC prom code | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2 of the License, or (at your | |
8 | * option) any later version. | |
9 | * | |
10 | * You should have received a copy of the GNU General Public License along | |
11 | * with this program; if not, write to the Free Software Foundation, Inc., | |
12 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
13 | * | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/string.h> | |
20 | ||
21 | #include <linux/serial_reg.h> | |
22 | ||
23 | #include <asm/bootinfo.h> | |
24 | #include <asm/mach-jz4740/base.h> | |
25 | ||
1d210386 | 26 | static __init void jz4740_init_cmdline(int argc, char *argv[]) |
a8b7e9e8 LPC |
27 | { |
28 | unsigned int count = COMMAND_LINE_SIZE - 1; | |
29 | int i; | |
30 | char *dst = &(arcs_cmdline[0]); | |
31 | char *src; | |
32 | ||
33 | for (i = 1; i < argc && count; ++i) { | |
34 | src = argv[i]; | |
35 | while (*src && count) { | |
36 | *dst++ = *src++; | |
37 | --count; | |
38 | } | |
39 | *dst++ = ' '; | |
40 | } | |
41 | if (i > 1) | |
42 | --dst; | |
43 | ||
44 | *dst = 0; | |
45 | } | |
46 | ||
47 | void __init prom_init(void) | |
48 | { | |
49 | jz4740_init_cmdline((int)fw_arg0, (char **)fw_arg1); | |
50 | mips_machtype = MACH_INGENIC_JZ4740; | |
51 | } | |
52 | ||
53 | void __init prom_free_prom_memory(void) | |
54 | { | |
55 | } | |
56 | ||
57 | #define UART_REG(_reg) ((void __iomem *)CKSEG1ADDR(JZ4740_UART0_BASE_ADDR + (_reg << 2))) | |
58 | ||
59 | void prom_putchar(char c) | |
60 | { | |
61 | uint8_t lsr; | |
62 | ||
63 | do { | |
64 | lsr = readb(UART_REG(UART_LSR)); | |
65 | } while ((lsr & UART_LSR_TEMT) == 0); | |
66 | ||
67 | writeb(c, UART_REG(UART_TX)); | |
68 | } |