| 1 | /* |
| 2 | * |
| 3 | * BRIEF MODULE DESCRIPTION |
| 4 | * PROM library initialisation code, supports YAMON and U-Boot. |
| 5 | * |
| 6 | * Copyright 2000, 2001, 2006 MontaVista Software Inc. |
| 7 | * Author: MontaVista Software, Inc. |
| 8 | * ppopov@mvista.com or source@mvista.com |
| 9 | * |
| 10 | * This file was derived from Carsten Langgaard's |
| 11 | * arch/mips/mips-boards/xx files. |
| 12 | * |
| 13 | * Carsten Langgaard, carstenl@mips.com |
| 14 | * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. |
| 15 | * |
| 16 | * This program is free software; you can redistribute it and/or modify it |
| 17 | * under the terms of the GNU General Public License as published by the |
| 18 | * Free Software Foundation; either version 2 of the License, or (at your |
| 19 | * option) any later version. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 24 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 25 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 26 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 27 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 28 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 30 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | * |
| 32 | * You should have received a copy of the GNU General Public License along |
| 33 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 34 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 35 | */ |
| 36 | |
| 37 | #include <linux/module.h> |
| 38 | #include <linux/kernel.h> |
| 39 | #include <linux/init.h> |
| 40 | #include <linux/string.h> |
| 41 | |
| 42 | #include <asm/bootinfo.h> |
| 43 | #include <asm/mach-jz4740/regs.h> |
| 44 | |
| 45 | /* #define DEBUG_CMDLINE */ |
| 46 | |
| 47 | int prom_argc; |
| 48 | char **prom_argv, **prom_envp; |
| 49 | |
| 50 | char *prom_getcmdline(void) |
| 51 | { |
| 52 | return &(arcs_cmdline[0]); |
| 53 | } |
| 54 | |
| 55 | void prom_init_cmdline(void) |
| 56 | { |
| 57 | char *cp, *c; |
| 58 | size_t i = 1; |
| 59 | |
| 60 | cp = &(arcs_cmdline[0]); |
| 61 | while(i < prom_argc) { |
| 62 | c = prom_argv[i]; |
| 63 | while (*c) { |
| 64 | *cp++ = *c++; |
| 65 | } |
| 66 | *cp++ = ' '; |
| 67 | i++; |
| 68 | } |
| 69 | if (i > 1) { |
| 70 | *(cp - 1) = '\0'; |
| 71 | } |
| 72 | |
| 73 | } |
| 74 | |
| 75 | void __init prom_init(void) |
| 76 | { |
| 77 | unsigned long memsize; |
| 78 | |
| 79 | prom_argc = (int) fw_arg0; |
| 80 | prom_argv = (char **) fw_arg1; |
| 81 | prom_envp = (char **) fw_arg2; |
| 82 | |
| 83 | mips_machtype = MACH_INGENIC_JZ4740; |
| 84 | |
| 85 | prom_init_cmdline(); |
| 86 | memsize = 0x04000000; |
| 87 | add_memory_region(0, memsize, BOOT_MEM_RAM); |
| 88 | } |
| 89 | |
| 90 | void __init prom_free_prom_memory(void) |
| 91 | { |
| 92 | } |
| 93 | |
| 94 | /* used by early printk */ |
| 95 | void prom_putchar(char c) |
| 96 | { |
| 97 | volatile u8 *uart_lsr = (volatile u8 *)(UART0_BASE + OFF_LSR); |
| 98 | volatile u8 *uart_tdr = (volatile u8 *)(UART0_BASE + OFF_TDR); |
| 99 | |
| 100 | /* Wait for fifo to shift out some bytes */ |
| 101 | while ( !((*uart_lsr & (UARTLSR_TDRQ | UARTLSR_TEMT)) == 0x60) ); |
| 102 | |
| 103 | *uart_tdr = (u8)c; |
| 104 | } |
| 105 | |
| 106 | const char *get_system_type(void) |
| 107 | { |
| 108 | return "JZ4740"; |
| 109 | } |
| 110 | |
| 111 | EXPORT_SYMBOL(prom_getcmdline); |
| 112 | |
