diff options
Diffstat (limited to 'target/linux/xburst/files-2.6.32/arch/mips/jz4740/prom.c')
| -rw-r--r-- | target/linux/xburst/files-2.6.32/arch/mips/jz4740/prom.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/prom.c b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/prom.c new file mode 100644 index 000000000..e28d8154c --- /dev/null +++ b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/prom.c @@ -0,0 +1,111 @@ +/* + * + * BRIEF MODULE DESCRIPTION + * PROM library initialisation code, supports YAMON and U-Boot. + * + * Copyright 2000, 2001, 2006 MontaVista Software Inc. + * Author: MontaVista Software, Inc. + * ppopov@mvista.com or source@mvista.com + * + * This file was derived from Carsten Langgaard's + * arch/mips/mips-boards/xx files. + * + * Carsten Langgaard, carstenl@mips.com + * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/string.h> + +#include <asm/bootinfo.h> +#include <asm/mach-jz4740/regs.h> + +/* #define DEBUG_CMDLINE */ + +int prom_argc; +char **prom_argv, **prom_envp; + +char *prom_getcmdline(void) +{ + return &(arcs_cmdline[0]); +} + +void prom_init_cmdline(void) +{ + char *cp, *c; + size_t i = 1; + + cp = &(arcs_cmdline[0]); + while(i < prom_argc) { + c = prom_argv[i]; + while (*c) { + *cp++ = *c++; + } + *cp++ = ' '; + i++; + } + if (i > 1) { + *(cp - 1) = '\0'; + } + +} + +void __init prom_init(void) +{ + unsigned long memsize; + + prom_argc = (int) fw_arg0; + prom_argv = (char **) fw_arg1; + prom_envp = (char **) fw_arg2; + + mips_machtype = MACH_INGENIC_JZ4740; + + prom_init_cmdline(); + memsize = 0x04000000; + add_memory_region(0, memsize, BOOT_MEM_RAM); +} + +void __init prom_free_prom_memory(void) +{ +} + +/* used by early printk */ +void prom_putchar(char c) +{ + volatile u8 *uart_lsr = (volatile u8 *)(UART0_BASE + OFF_LSR); + volatile u8 *uart_tdr = (volatile u8 *)(UART0_BASE + OFF_TDR); + + /* Wait for fifo to shift out some bytes */ + while ( !((*uart_lsr & (UARTLSR_TDRQ | UARTLSR_TEMT)) == 0x60) ); + + *uart_tdr = (u8)c; +} + +const char *get_system_type(void) +{ + return "JZ4740"; +} + +EXPORT_SYMBOL(prom_getcmdline); |