1621633323
Based on 2 normalized pattern(s): 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 program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details 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 51 franklin street fifth floor boston ma 02110 1301 usa 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 [no]_[pad]_[ctrl] any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details 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 51 franklin street fifth floor boston ma 02110 1301 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 176 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154040.652910950@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
131 lines
2.9 KiB
C
131 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* RouterBoard 500 specific prom routines
|
|
*
|
|
* Copyright (C) 2003, Peter Sadik <peter.sadik@idt.com>
|
|
* Copyright (C) 2005-2006, P.Christeas <p_christ@hol.gr>
|
|
* Copyright (C) 2007, Gabor Juhos <juhosg@openwrt.org>
|
|
* Felix Fietkau <nbd@openwrt.org>
|
|
* Florian Fainelli <florian@openwrt.org>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/export.h>
|
|
#include <linux/string.h>
|
|
#include <linux/console.h>
|
|
#include <linux/memblock.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/blkdev.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
#include <asm/mach-rc32434/ddr.h>
|
|
#include <asm/mach-rc32434/prom.h>
|
|
|
|
unsigned int idt_cpu_freq = 132000000;
|
|
EXPORT_SYMBOL(idt_cpu_freq);
|
|
|
|
static struct resource ddr_reg[] = {
|
|
{
|
|
.name = "ddr-reg",
|
|
.start = DDR0_PHYS_ADDR,
|
|
.end = DDR0_PHYS_ADDR + sizeof(struct ddr_ram),
|
|
.flags = IORESOURCE_MEM,
|
|
}
|
|
};
|
|
|
|
void __init prom_free_prom_memory(void)
|
|
{
|
|
/* No prom memory to free */
|
|
}
|
|
|
|
static inline int match_tag(char *arg, const char *tag)
|
|
{
|
|
return strncmp(arg, tag, strlen(tag)) == 0;
|
|
}
|
|
|
|
static inline unsigned long tag2ul(char *arg, const char *tag)
|
|
{
|
|
char *num;
|
|
|
|
num = arg + strlen(tag);
|
|
return simple_strtoul(num, 0, 10);
|
|
}
|
|
|
|
void __init prom_setup_cmdline(void)
|
|
{
|
|
static char cmd_line[COMMAND_LINE_SIZE] __initdata;
|
|
char *cp, *board;
|
|
int prom_argc;
|
|
char **prom_argv;
|
|
int i;
|
|
|
|
prom_argc = fw_arg0;
|
|
prom_argv = (char **) fw_arg1;
|
|
|
|
cp = cmd_line;
|
|
/* Note: it is common that parameters start
|
|
* at argv[1] and not argv[0],
|
|
* however, our elf loader starts at [0] */
|
|
for (i = 0; i < prom_argc; i++) {
|
|
if (match_tag(prom_argv[i], FREQ_TAG)) {
|
|
idt_cpu_freq = tag2ul(prom_argv[i], FREQ_TAG);
|
|
continue;
|
|
}
|
|
#ifdef IGNORE_CMDLINE_MEM
|
|
/* parses out the "mem=xx" arg */
|
|
if (match_tag(prom_argv[i], MEM_TAG))
|
|
continue;
|
|
#endif
|
|
if (i > 0)
|
|
*(cp++) = ' ';
|
|
if (match_tag(prom_argv[i], BOARD_TAG)) {
|
|
board = prom_argv[i] + strlen(BOARD_TAG);
|
|
|
|
if (match_tag(board, BOARD_RB532A))
|
|
mips_machtype = MACH_MIKROTIK_RB532A;
|
|
else
|
|
mips_machtype = MACH_MIKROTIK_RB532;
|
|
}
|
|
|
|
strcpy(cp, prom_argv[i]);
|
|
cp += strlen(prom_argv[i]);
|
|
}
|
|
*(cp++) = ' ';
|
|
|
|
i = strlen(arcs_cmdline);
|
|
if (i > 0) {
|
|
*(cp++) = ' ';
|
|
strcpy(cp, arcs_cmdline);
|
|
cp += strlen(arcs_cmdline);
|
|
}
|
|
cmd_line[COMMAND_LINE_SIZE - 1] = '\0';
|
|
|
|
strcpy(arcs_cmdline, cmd_line);
|
|
}
|
|
|
|
void __init prom_init(void)
|
|
{
|
|
struct ddr_ram __iomem *ddr;
|
|
phys_addr_t memsize;
|
|
phys_addr_t ddrbase;
|
|
|
|
ddr = ioremap_nocache(ddr_reg[0].start,
|
|
ddr_reg[0].end - ddr_reg[0].start);
|
|
|
|
if (!ddr) {
|
|
printk(KERN_ERR "Unable to remap DDR register\n");
|
|
return;
|
|
}
|
|
|
|
ddrbase = (phys_addr_t)&ddr->ddrbase;
|
|
memsize = (phys_addr_t)&ddr->ddrmask;
|
|
memsize = 0 - memsize;
|
|
|
|
prom_setup_cmdline();
|
|
|
|
/* give all RAM to boot allocator,
|
|
* except for the first 0x400 and the last 0x200 bytes */
|
|
add_memory_region(ddrbase + 0x400, memsize - 0x600, BOOT_MEM_RAM);
|
|
}
|