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v6.2
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *  RouterBoard 500 specific prom routines
  4 *
  5 *  Copyright (C) 2003, Peter Sadik <peter.sadik@idt.com>
  6 *  Copyright (C) 2005-2006, P.Christeas <p_christ@hol.gr>
  7 *  Copyright (C) 2007, Gabor Juhos <juhosg@openwrt.org>
  8 *			Felix Fietkau <nbd@openwrt.org>
  9 *			Florian Fainelli <florian@openwrt.org>
 10 */
 11
 12#include <linux/init.h>
 13#include <linux/mm.h>
 14#include <linux/export.h>
 15#include <linux/string.h>
 16#include <linux/console.h>
 17#include <linux/memblock.h>
 18#include <linux/ioport.h>
 19
 20#include <asm/bootinfo.h>
 21#include <asm/mach-rc32434/ddr.h>
 22#include <asm/mach-rc32434/prom.h>
 23
 24unsigned int idt_cpu_freq = 132000000;
 25EXPORT_SYMBOL(idt_cpu_freq);
 26
 27static struct resource ddr_reg[] = {
 28	{
 29		.name = "ddr-reg",
 30		.start = DDR0_PHYS_ADDR,
 31		.end = DDR0_PHYS_ADDR + sizeof(struct ddr_ram),
 32		.flags = IORESOURCE_MEM,
 33	}
 34};
 35
 36static inline int match_tag(char *arg, const char *tag)
 37{
 38	return strncmp(arg, tag, strlen(tag)) == 0;
 39}
 40
 41static inline unsigned long tag2ul(char *arg, const char *tag)
 42{
 43	char *num;
 44
 45	num = arg + strlen(tag);
 46	return simple_strtoul(num, 0, 10);
 47}
 48
 49void __init prom_setup_cmdline(void)
 50{
 51	static char cmd_line[COMMAND_LINE_SIZE] __initdata;
 52	char *cp, *board;
 53	int prom_argc;
 54	char **prom_argv;
 55	int i;
 56
 57	prom_argc = fw_arg0;
 58	prom_argv = (char **) fw_arg1;
 59
 60	cp = cmd_line;
 61		/* Note: it is common that parameters start
 62		 * at argv[1] and not argv[0],
 63		 * however, our elf loader starts at [0] */
 64	for (i = 0; i < prom_argc; i++) {
 65		if (match_tag(prom_argv[i], FREQ_TAG)) {
 66			idt_cpu_freq = tag2ul(prom_argv[i], FREQ_TAG);
 67			continue;
 68		}
 69#ifdef IGNORE_CMDLINE_MEM
 70		/* parses out the "mem=xx" arg */
 71		if (match_tag(prom_argv[i], MEM_TAG))
 72			continue;
 73#endif
 74		if (i > 0)
 75			*(cp++) = ' ';
 76		if (match_tag(prom_argv[i], BOARD_TAG)) {
 77			board = prom_argv[i] + strlen(BOARD_TAG);
 78
 79			if (match_tag(board, BOARD_RB532A))
 80				mips_machtype = MACH_MIKROTIK_RB532A;
 81			else
 82				mips_machtype = MACH_MIKROTIK_RB532;
 83		}
 84
 85		strcpy(cp, prom_argv[i]);
 86		cp += strlen(prom_argv[i]);
 87	}
 88	*(cp++) = ' ';
 89
 90	i = strlen(arcs_cmdline);
 91	if (i > 0) {
 92		*(cp++) = ' ';
 93		strcpy(cp, arcs_cmdline);
 94		cp += strlen(arcs_cmdline);
 95	}
 96	cmd_line[COMMAND_LINE_SIZE - 1] = '\0';
 97
 98	strcpy(arcs_cmdline, cmd_line);
 99}
100
101void __init prom_init(void)
102{
103	struct ddr_ram __iomem *ddr;
104	phys_addr_t memsize;
105	phys_addr_t ddrbase;
106
107	ddr = ioremap(ddr_reg[0].start,
108			ddr_reg[0].end - ddr_reg[0].start);
109
110	if (!ddr) {
111		printk(KERN_ERR "Unable to remap DDR register\n");
112		return;
113	}
114
115	ddrbase = (phys_addr_t)&ddr->ddrbase;
116	memsize = (phys_addr_t)&ddr->ddrmask;
117	memsize = 0 - memsize;
118
119	prom_setup_cmdline();
120
121	/* give all RAM to boot allocator,
122	 * except for the first 0x400 and the last 0x200 bytes */
123	memblock_add(ddrbase + 0x400, memsize - 0x600);
124}
v6.13.7
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *  RouterBoard 500 specific prom routines
  4 *
  5 *  Copyright (C) 2003, Peter Sadik <peter.sadik@idt.com>
  6 *  Copyright (C) 2005-2006, P.Christeas <p_christ@hol.gr>
  7 *  Copyright (C) 2007, Gabor Juhos <juhosg@openwrt.org>
  8 *			Felix Fietkau <nbd@openwrt.org>
  9 *			Florian Fainelli <florian@openwrt.org>
 10 */
 11
 12#include <linux/init.h>
 13#include <linux/mm.h>
 14#include <linux/export.h>
 15#include <linux/string.h>
 16#include <linux/console.h>
 17#include <linux/memblock.h>
 18#include <linux/ioport.h>
 19
 20#include <asm/bootinfo.h>
 21#include <asm/mach-rc32434/ddr.h>
 22#include <asm/mach-rc32434/prom.h>
 23
 24unsigned int idt_cpu_freq = 132000000;
 25EXPORT_SYMBOL(idt_cpu_freq);
 26
 27static struct resource ddr_reg[] = {
 28	{
 29		.name = "ddr-reg",
 30		.start = DDR0_PHYS_ADDR,
 31		.end = DDR0_PHYS_ADDR + sizeof(struct ddr_ram),
 32		.flags = IORESOURCE_MEM,
 33	}
 34};
 35
 36static inline int match_tag(char *arg, const char *tag)
 37{
 38	return strncmp(arg, tag, strlen(tag)) == 0;
 39}
 40
 41static inline unsigned long tag2ul(char *arg, const char *tag)
 42{
 43	char *num;
 44
 45	num = arg + strlen(tag);
 46	return simple_strtoul(num, 0, 10);
 47}
 48
 49static void __init prom_setup_cmdline(void)
 50{
 51	static char cmd_line[COMMAND_LINE_SIZE] __initdata;
 52	char *cp, *board;
 53	int prom_argc;
 54	char **prom_argv;
 55	int i;
 56
 57	prom_argc = fw_arg0;
 58	prom_argv = (char **) fw_arg1;
 59
 60	cp = cmd_line;
 61		/* Note: it is common that parameters start
 62		 * at argv[1] and not argv[0],
 63		 * however, our elf loader starts at [0] */
 64	for (i = 0; i < prom_argc; i++) {
 65		if (match_tag(prom_argv[i], FREQ_TAG)) {
 66			idt_cpu_freq = tag2ul(prom_argv[i], FREQ_TAG);
 67			continue;
 68		}
 69#ifdef IGNORE_CMDLINE_MEM
 70		/* parses out the "mem=xx" arg */
 71		if (match_tag(prom_argv[i], MEM_TAG))
 72			continue;
 73#endif
 74		if (i > 0)
 75			*(cp++) = ' ';
 76		if (match_tag(prom_argv[i], BOARD_TAG)) {
 77			board = prom_argv[i] + strlen(BOARD_TAG);
 78
 79			if (match_tag(board, BOARD_RB532A))
 80				mips_machtype = MACH_MIKROTIK_RB532A;
 81			else
 82				mips_machtype = MACH_MIKROTIK_RB532;
 83		}
 84
 85		strcpy(cp, prom_argv[i]);
 86		cp += strlen(prom_argv[i]);
 87	}
 88	*(cp++) = ' ';
 89
 90	i = strlen(arcs_cmdline);
 91	if (i > 0) {
 92		*(cp++) = ' ';
 93		strcpy(cp, arcs_cmdline);
 94		cp += strlen(arcs_cmdline);
 95	}
 96	cmd_line[COMMAND_LINE_SIZE - 1] = '\0';
 97
 98	strcpy(arcs_cmdline, cmd_line);
 99}
100
101void __init prom_init(void)
102{
103	struct ddr_ram __iomem *ddr;
104	phys_addr_t memsize;
105	phys_addr_t ddrbase;
106
107	ddr = ioremap(ddr_reg[0].start,
108			ddr_reg[0].end - ddr_reg[0].start);
109
110	if (!ddr) {
111		printk(KERN_ERR "Unable to remap DDR register\n");
112		return;
113	}
114
115	ddrbase = (phys_addr_t)&ddr->ddrbase;
116	memsize = (phys_addr_t)&ddr->ddrmask;
117	memsize = 0 - memsize;
118
119	prom_setup_cmdline();
120
121	/* give all RAM to boot allocator,
122	 * except for the first 0x400 and the last 0x200 bytes */
123	memblock_add(ddrbase + 0x400, memsize - 0x600);
124}