MIPS: Loongson{2ef, 32, 64} convert to generic fw cmdline

All of Loongson firmwares are passing boot cmdline/env
in the manner of YAMON/PMON. Thus we can remove duplicated
cmdline initialize code and convert to generic fw method.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: chenhe@lemote.com

4 files changed, 8 insertions, 68 deletions

diff --git a/arch/mips/loongson2ef/common/Makefile b/arch/mips/loongson2ef/common/Makefile
index 684624f61f5a..10dd009a20a0 100644
--- a/arch/mips/loongson2ef/common/Makefile
+++ b/arch/mips/loongson2ef/common/Makefile
@@ -3,7 +3,7 @@
 # Makefile for loongson based machines.
 #
 
-obj-y += setup.o init.o cmdline.o env.o time.o reset.o irq.o \
+obj-y += setup.o init.o env.o time.o reset.o irq.o \
     bonito-irq.o mem.o machtype.o platform.o serial.o
 obj-$(CONFIG_PCI) += pci.o
 
diff --git a/arch/mips/loongson2ef/common/cmdline.c b/arch/mips/loongson2ef/common/cmdline.c
deleted file mode 100644
index a735460682cf..000000000000
--- a/arch/mips/loongson2ef/common/cmdline.c
+++ /dev/null
@@ -1,44 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Based on Ocelot Linux port, which is
- * Copyright 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * Copyright 2003 ICT CAS
- * Author: Michael Guo <guoyi@ict.ac.cn>
- *
- * Copyright (C) 2007 Lemote Inc. & Institute of Computing Technology
- * Author: Fuxin Zhang, zhangfx@lemote.com
- *
- * Copyright (C) 2009 Lemote Inc.
- * Author: Wu Zhangjin, wuzhangjin@gmail.com
- */
-#include <asm/bootinfo.h>
-
-#include <loongson.h>
-
-void __init prom_init_cmdline(void)
-{
-	int prom_argc;
-	/* pmon passes arguments in 32bit pointers */
-	int *_prom_argv;
-	int i;
-	long l;
-
-	/* firmware arguments are initialized in head.S */
-	prom_argc = fw_arg0;
-	_prom_argv = (int *)fw_arg1;
-
-	/* arg[0] is "g", the rest is boot parameters */
-	arcs_cmdline[0] = '\0';
-	for (i = 1; i < prom_argc; i++) {
-		l = (long)_prom_argv[i];
-		if (strlen(arcs_cmdline) + strlen(((char *)l) + 1)
-		    >= sizeof(arcs_cmdline))
-			break;
-		strcat(arcs_cmdline, ((char *)l));
-		strcat(arcs_cmdline, " ");
-	}
-
-	prom_init_machtype();
-}
diff --git a/arch/mips/loongson2ef/common/env.c b/arch/mips/loongson2ef/common/env.c
index 29c5fecb8282..6f20bdf9b242 100644
--- a/arch/mips/loongson2ef/common/env.c
+++ b/arch/mips/loongson2ef/common/env.c
@@ -15,39 +15,21 @@
  */
 #include <linux/export.h>
 #include <asm/bootinfo.h>
+#include <asm/fw/fw.h>
 #include <loongson.h>
 
 u32 cpu_clock_freq;
 EXPORT_SYMBOL(cpu_clock_freq);
 
-unsigned long long smp_group[4];
-
-#define parse_even_earlier(res, option, p)				\
-do {									\
-	unsigned int tmp __maybe_unused;				\
-									\
-	if (strncmp(option, (char *)p, strlen(option)) == 0)		\
-		tmp = kstrtou32((char *)p + strlen(option"="), 10, &res); \
-} while (0)
-
 void __init prom_init_env(void)
 {
 	/* pmon passes arguments in 32bit pointers */
 	unsigned int processor_id;
-	int *_prom_envp;
-	long l;
 
-	/* firmware arguments are initialized in head.S */
-	_prom_envp = (int *)fw_arg2;
+	cpu_clock_freq = fw_getenvl("cpuclock");
+	memsize = fw_getenvl("memsize");
+	highmemsize = fw_getenvl("highmemsize");
 
-	l = (long)*_prom_envp;
-	while (l != 0) {
-		parse_even_earlier(cpu_clock_freq, "cpuclock", l);
-		parse_even_earlier(memsize, "memsize", l);
-		parse_even_earlier(highmemsize, "highmemsize", l);
-		_prom_envp++;
-		l = (long)*_prom_envp;
-	}
 	if (memsize == 0)
 		memsize = 256;
 
diff --git a/arch/mips/loongson2ef/common/init.c b/arch/mips/loongson2ef/common/init.c
index a45430365729..dab3ffda8b14 100644
--- a/arch/mips/loongson2ef/common/init.c
+++ b/arch/mips/loongson2ef/common/init.c
@@ -9,6 +9,7 @@
 #include <asm/traps.h>
 #include <asm/smp-ops.h>
 #include <asm/cacheflush.h>
+#include <asm/fw/fw.h>
 
 #include <loongson.h>
 
@@ -32,7 +33,8 @@ void __init prom_init(void)
 		ioremap(LOONGSON_ADDRWINCFG_BASE, LOONGSON_ADDRWINCFG_SIZE);
 #endif
 
-	prom_init_cmdline();
+	fw_init_cmdline();
+	prom_init_machtype();
 	prom_init_env();
 
 	/* init base address of io space */