[PATCH 0/5] Loongson cleanups

[PATCH 0/5] Loongson cleanups

[Jiaxun Yang]

Hi all,
This series reduced duplicated code in Loongson platform.



Jiaxun Yang (5):
  MIPS: Drop pmon.h
  MIPS: Loongson{2ef, 32, 64} convert to generic fw cmdline
  MIPS: Drop CPU_SUPPORTS_UNCACHED_ACCELERATED
  MIPS: Loongson2ef: Convert to early_printk_8250
  MIPS: Loongson64: Drop setup_pcimap

 arch/mips/Kconfig                             |  3 -
 .../include/asm/mach-loongson2ef/loongson.h   |  2 -
 arch/mips/include/asm/mach-loongson32/prom.h  | 20 -------
 .../include/asm/mach-loongson64/loongson.h    |  1 -
 arch/mips/include/asm/pgtable.h               | 11 ----
 arch/mips/include/asm/pmon.h                  | 46 ---------------
 arch/mips/kernel/smp-bmips.c                  |  1 -
 arch/mips/loongson2ef/Kconfig                 |  2 +
 arch/mips/loongson2ef/common/Makefile         |  3 +-
 arch/mips/loongson2ef/common/cmdline.c        | 44 --------------
 arch/mips/loongson2ef/common/early_printk.c   | 38 ------------
 arch/mips/loongson2ef/common/env.c            | 26 ++------
 arch/mips/loongson2ef/common/init.c           |  5 +-
 arch/mips/loongson2ef/common/mem.c            | 58 ------------------
 arch/mips/loongson2ef/common/uart_base.c      |  2 +
 arch/mips/loongson32/common/prom.c            | 59 ++++---------------
 arch/mips/loongson32/common/setup.c           | 11 ++--
 arch/mips/loongson64/Makefile                 |  2 +-
 arch/mips/loongson64/cmdline.c                | 42 -------------
 arch/mips/loongson64/init.c                   |  3 +-
 arch/mips/loongson64/pci.c                    | 43 --------------
 21 files changed, 32 insertions(+), 390 deletions(-)
 delete mode 100644 arch/mips/include/asm/mach-loongson32/prom.h
 delete mode 100644 arch/mips/include/asm/pmon.h
 delete mode 100644 arch/mips/loongson2ef/common/cmdline.c
 delete mode 100644 arch/mips/loongson2ef/common/early_printk.c
 delete mode 100644 arch/mips/loongson64/cmdline.c

-- 
2.20.1

[PATCH 1/5] MIPS: Drop pmon.h

[Jiaxun Yang]

There is no code still using pmon callvectors.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 arch/mips/include/asm/pmon.h | 46 ------------------------------------
 arch/mips/kernel/smp-bmips.c |  1 -
 2 files changed, 47 deletions(-)
 delete mode 100644 arch/mips/include/asm/pmon.h

diff --git a/arch/mips/include/asm/pmon.h b/arch/mips/include/asm/pmon.h
deleted file mode 100644
index 6ad519189ce2..000000000000
--- a/arch/mips/include/asm/pmon.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2004 by Ralf Baechle
- *
- * The cpustart method is a PMC-Sierra's function to start the secondary CPU.
- * Stock PMON 2000 has the smpfork, semlock and semunlock methods instead.
- */
-#ifndef _ASM_PMON_H
-#define _ASM_PMON_H
-
-struct callvectors {
-	int	(*open) (char*, int, int);
-	int	(*close) (int);
-	int	(*read) (int, void*, int);
-	int	(*write) (int, void*, int);
-	off_t	(*lseek) (int, off_t, int);
-	int	(*printf) (const char*, ...);
-	void	(*cacheflush) (void);
-	char*	(*gets) (char*);
-	union {
-		int	(*smpfork) (unsigned long cp, char *sp);
-		int	(*cpustart) (long, void (*)(void), void *, long);
-	} _s;
-	int	(*semlock) (int sem);
-	void	(*semunlock) (int sem);
-};
-
-extern struct callvectors *debug_vectors;
-
-#define pmon_open(name, flags, mode)	debug_vectors->open(name, flage, mode)
-#define pmon_close(fd)			debug_vectors->close(fd)
-#define pmon_read(fd, buf, count)	debug_vectors->read(fd, buf, count)
-#define pmon_write(fd, buf, count)	debug_vectors->write(fd, buf, count)
-#define pmon_lseek(fd, off, whence)	debug_vectors->lseek(fd, off, whence)
-#define pmon_printf(fmt...)		debug_vectors->printf(fmt)
-#define pmon_cacheflush()		debug_vectors->cacheflush()
-#define pmon_gets(s)			debug_vectors->gets(s)
-#define pmon_cpustart(n, f, sp, gp)	debug_vectors->_s.cpustart(n, f, sp, gp)
-#define pmon_smpfork(cp, sp)		debug_vectors->_s.smpfork(cp, sp)
-#define pmon_semlock(sem)		debug_vectors->semlock(sem)
-#define pmon_semunlock(sem)		debug_vectors->semunlock(sem)
-
-#endif /* _ASM_PMON_H */
diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c
index 712c15de6ab9..9058e9dcf080 100644
--- a/arch/mips/kernel/smp-bmips.c
+++ b/arch/mips/kernel/smp-bmips.c
@@ -31,7 +31,6 @@
 #include <asm/pgtable.h>
 #include <asm/processor.h>
 #include <asm/bootinfo.h>
-#include <asm/pmon.h>
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
 #include <asm/mipsregs.h>
-- 
2.20.1

[PATCH 2/5] MIPS: Loongson{2ef, 32, 64} convert to generic fw cmdline

[Jiaxun Yang]

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>
---
 .../include/asm/mach-loongson2ef/loongson.h   |  1 -
 arch/mips/include/asm/mach-loongson32/prom.h  | 20 -------
 .../include/asm/mach-loongson64/loongson.h    |  1 -
 arch/mips/loongson2ef/common/Makefile         |  2 +-
 arch/mips/loongson2ef/common/cmdline.c        | 44 --------------
 arch/mips/loongson2ef/common/env.c            | 26 ++------
 arch/mips/loongson2ef/common/init.c           |  4 +-
 arch/mips/loongson32/common/prom.c            | 59 ++++---------------
 arch/mips/loongson32/common/setup.c           | 11 ++--
 arch/mips/loongson64/Makefile                 |  2 +-
 arch/mips/loongson64/cmdline.c                | 42 -------------
 arch/mips/loongson64/init.c                   |  3 +-
 12 files changed, 28 insertions(+), 187 deletions(-)
 delete mode 100644 arch/mips/include/asm/mach-loongson32/prom.h
 delete mode 100644 arch/mips/loongson2ef/common/cmdline.c
 delete mode 100644 arch/mips/loongson64/cmdline.c

diff --git a/arch/mips/include/asm/mach-loongson2ef/loongson.h b/arch/mips/include/asm/mach-loongson2ef/loongson.h
index 8ed460a64d10..622456539add 100644
--- a/arch/mips/include/asm/mach-loongson2ef/loongson.h
+++ b/arch/mips/include/asm/mach-loongson2ef/loongson.h
@@ -25,7 +25,6 @@ extern const struct plat_smp_ops loongson3_smp_ops;
 
 /* loongson-specific command line, env and memory initialization */
 extern void __init prom_init_memory(void);
-extern void __init prom_init_cmdline(void);
 extern void __init prom_init_machtype(void);
 extern void __init prom_init_env(void);
 #ifdef CONFIG_LOONGSON_UART_BASE
diff --git a/arch/mips/include/asm/mach-loongson32/prom.h b/arch/mips/include/asm/mach-loongson32/prom.h
deleted file mode 100644
index cb789f18d790..000000000000
--- a/arch/mips/include/asm/mach-loongson32/prom.h
+++ /dev/null
@@ -1,20 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
- */
-
-#ifndef __ASM_MACH_LOONGSON32_PROM_H
-#define __ASM_MACH_LOONGSON32_PROM_H
-
-#include <linux/io.h>
-#include <linux/init.h>
-#include <linux/irq.h>
-
-/* environment arguments from bootloader */
-extern unsigned long memsize, highmemsize;
-
-/* loongson-specific command line, env and memory initialization */
-extern char *prom_getenv(char *name);
-extern void __init prom_init_cmdline(void);
-
-#endif /* __ASM_MACH_LOONGSON32_PROM_H */
diff --git a/arch/mips/include/asm/mach-loongson64/loongson.h b/arch/mips/include/asm/mach-loongson64/loongson.h
index bc00c2d88225..a8fce112a9b0 100644
--- a/arch/mips/include/asm/mach-loongson64/loongson.h
+++ b/arch/mips/include/asm/mach-loongson64/loongson.h
@@ -24,7 +24,6 @@ extern const struct plat_smp_ops loongson3_smp_ops;
 
 /* loongson-specific command line, env and memory initialization */
 extern void __init prom_init_memory(void);
-extern void __init prom_init_cmdline(void);
 extern void __init prom_init_env(void);
 
 /* irq operation functions */
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 */
diff --git a/arch/mips/loongson32/common/prom.c b/arch/mips/loongson32/common/prom.c
index c4e043ee53ff..73dd25142484 100644
--- a/arch/mips/loongson32/common/prom.c
+++ b/arch/mips/loongson32/common/prom.c
@@ -5,63 +5,25 @@
  * Modified from arch/mips/pnx833x/common/prom.c.
  */
 
+#include <linux/io.h>
+#include <linux/init.h>
 #include <linux/serial_reg.h>
 #include <asm/bootinfo.h>
+#include <asm/fw/fw.h>
 
 #include <loongson1.h>
-#include <prom.h>
 
-int prom_argc;
-char **prom_argv, **prom_envp;
-unsigned long memsize, highmemsize;
-
-char *prom_getenv(char *envname)
-{
-	char **env = prom_envp;
-	int i;
-
-	i = strlen(envname);
-
-	while (*env) {
-		if (strncmp(envname, *env, i) == 0 && *(*env + i) == '=')
-			return *env + i + 1;
-		env++;
-	}
-
-	return 0;
-}
-
-static inline unsigned long env_or_default(char *env, unsigned long dfl)
-{
-	char *str = prom_getenv(env);
-	return str ? simple_strtol(str, 0, 0) : dfl;
-}
-
-void __init prom_init_cmdline(void)
-{
-	char *c = &(arcs_cmdline[0]);
-	int i;
-
-	for (i = 1; i < prom_argc; i++) {
-		strcpy(c, prom_argv[i]);
-		c += strlen(prom_argv[i]);
-		if (i < prom_argc - 1)
-			*c++ = ' ';
-	}
-	*c = 0;
-}
+unsigned long memsize;
 
 void __init prom_init(void)
 {
 	void __iomem *uart_base;
-	prom_argc = fw_arg0;
-	prom_argv = (char **)fw_arg1;
-	prom_envp = (char **)fw_arg2;
 
-	prom_init_cmdline();
+	fw_init_cmdline();
 
-	memsize = env_or_default("memsize", DEFAULT_MEMSIZE);
-	highmemsize = env_or_default("highmemsize", 0x0);
+	memsize = fw_getenvl("memsize");
+	if(!memsize)
+		memsize = DEFAULT_MEMSIZE;
 
 	if (strstr(arcs_cmdline, "console=ttyS3"))
 		uart_base = ioremap_nocache(LS1X_UART3_BASE, 0x0f);
@@ -77,3 +39,8 @@ void __init prom_init(void)
 void __init prom_free_prom_memory(void)
 {
 }
+
+void __init plat_mem_setup(void)
+{
+	add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
+}
diff --git a/arch/mips/loongson32/common/setup.c b/arch/mips/loongson32/common/setup.c
index 8b03e18fc4d8..4733fe037176 100644
--- a/arch/mips/loongson32/common/setup.c
+++ b/arch/mips/loongson32/common/setup.c
@@ -3,15 +3,12 @@
  * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
  */
 
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <asm/cpu-info.h>
 #include <asm/bootinfo.h>
 
-#include <prom.h>
-
-void __init plat_mem_setup(void)
-{
-	add_memory_region(0x0, (memsize << 20), BOOT_MEM_RAM);
-}
-
 const char *get_system_type(void)
 {
 	unsigned int processor_id = (&current_cpu_data)->processor_id;
diff --git a/arch/mips/loongson64/Makefile b/arch/mips/loongson64/Makefile
index 0b3c65b52965..7821891bc5d0 100644
--- a/arch/mips/loongson64/Makefile
+++ b/arch/mips/loongson64/Makefile
@@ -3,7 +3,7 @@
 # Makefile for Loongson-3 family machines
 #
 obj-$(CONFIG_MACH_LOONGSON64) += irq.o cop2-ex.o platform.o acpi_init.o dma.o \
-				setup.o init.o cmdline.o env.o time.o reset.o \
+				setup.o init.o env.o time.o reset.o \
 
 obj-$(CONFIG_SMP)	+= smp.o
 obj-$(CONFIG_NUMA)	+= numa.o
diff --git a/arch/mips/loongson64/cmdline.c b/arch/mips/loongson64/cmdline.c
deleted file mode 100644
index fb1644b01471..000000000000
--- a/arch/mips/loongson64/cmdline.c
+++ /dev/null
@@ -1,42 +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, " ");
-	}
-}
diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c
index 48b44f415059..5ac1a0f35ca4 100644
--- a/arch/mips/loongson64/init.c
+++ b/arch/mips/loongson64/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>
 
@@ -24,7 +25,7 @@ static void __init mips_nmi_setup(void)
 
 void __init prom_init(void)
 {
-	prom_init_cmdline();
+	fw_init_cmdline();
 	prom_init_env();
 
 	/* init base address of io space */
-- 
2.20.1

[PATCH 3/5] MIPS: Drop CPU_SUPPORTS_UNCACHED_ACCELERATED

[Jiaxun Yang]

CPU_SUPPORTS_UNCACHED_ACCELERATED was introduced when kernel can't handle
writecombine remap well. Nowadays drivers can try writecombine remap by
themselves so this function is nolonger needed.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 arch/mips/Kconfig                  |  3 --
 arch/mips/include/asm/pgtable.h    | 11 ------
 arch/mips/loongson2ef/common/mem.c | 58 ------------------------------
 3 files changed, 72 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 7cb894776f44..3dd7540c82bb 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1966,7 +1966,6 @@ config SYS_HAS_CPU_LOONGSON2F
 	bool
 	select CPU_SUPPORTS_CPUFREQ
 	select CPU_SUPPORTS_ADDRWINCFG if 64BIT
-	select CPU_SUPPORTS_UNCACHED_ACCELERATED
 
 config SYS_HAS_CPU_LOONGSON1B
 	bool
@@ -2143,8 +2142,6 @@ config CPU_SUPPORTS_ADDRWINCFG
 config CPU_SUPPORTS_HUGEPAGES
 	bool
 	depends on !(32BIT && (ARCH_PHYS_ADDR_T_64BIT || EVA))
-config CPU_SUPPORTS_UNCACHED_ACCELERATED
-	bool
 config MIPS_PGD_C0_CONTEXT
 	bool
 	default y if 64BIT && (CPU_MIPSR2 || CPU_MIPSR6) && !CPU_XLP
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index f85bd5b15f51..91b89aab1787 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -643,17 +643,6 @@ static inline pmd_t pmdp_huge_get_and_clear(struct mm_struct *mm,
 
 #include <asm-generic/pgtable.h>
 
-/*
- * uncached accelerated TLB map for video memory access
- */
-#ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED
-#define __HAVE_PHYS_MEM_ACCESS_PROT
-
-struct file;
-pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
-		unsigned long size, pgprot_t vma_prot);
-#endif
-
 /*
  * We provide our own get_unmapped area to cope with the virtual aliasing
  * constraints placed on us by the cache architecture.
diff --git a/arch/mips/loongson2ef/common/mem.c b/arch/mips/loongson2ef/common/mem.c
index 11bf6eefb82a..ae21f1c62baa 100644
--- a/arch/mips/loongson2ef/common/mem.c
+++ b/arch/mips/loongson2ef/common/mem.c
@@ -60,61 +60,3 @@ int __uncached_access(struct file *file, unsigned long addr)
 		((addr >= LOONGSON_MMIO_MEM_START) &&
 		 (addr < LOONGSON_MMIO_MEM_END));
 }
-
-#ifdef CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED
-
-#include <linux/pci.h>
-#include <linux/sched.h>
-#include <asm/current.h>
-
-static unsigned long uca_start, uca_end;
-
-pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
-			      unsigned long size, pgprot_t vma_prot)
-{
-	unsigned long offset = pfn << PAGE_SHIFT;
-	unsigned long end = offset + size;
-
-	if (__uncached_access(file, offset)) {
-		if (uca_start && (offset >= uca_start) &&
-		    (end <= uca_end))
-			return __pgprot((pgprot_val(vma_prot) &
-					 ~_CACHE_MASK) |
-					_CACHE_UNCACHED_ACCELERATED);
-		else
-			return pgprot_noncached(vma_prot);
-	}
-	return vma_prot;
-}
-
-static int __init find_vga_mem_init(void)
-{
-	struct pci_dev *dev = 0;
-	struct resource *r;
-	int idx;
-
-	if (uca_start)
-		return 0;
-
-	for_each_pci_dev(dev) {
-		if ((dev->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
-			for (idx = 0; idx < PCI_NUM_RESOURCES; idx++) {
-				r = &dev->resource[idx];
-				if (!r->start && r->end)
-					continue;
-				if (r->flags & IORESOURCE_IO)
-					continue;
-				if (r->flags & IORESOURCE_MEM) {
-					uca_start = r->start;
-					uca_end = r->end;
-					return 0;
-				}
-			}
-		}
-	}
-
-	return 0;
-}
-
-late_initcall(find_vga_mem_init);
-#endif /* !CONFIG_CPU_SUPPORTS_UNCACHED_ACCELERATED */
-- 
2.20.1

[PATCH 4/5] MIPS: Loongson2ef: Convert to early_printk_8250

[Jiaxun Yang]

early_printk.c is doing the same with early_printk_8250.
Remove duplicated code.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 .../include/asm/mach-loongson2ef/loongson.h   |  1 -
 arch/mips/loongson2ef/Kconfig                 |  2 +
 arch/mips/loongson2ef/common/Makefile         |  1 -
 arch/mips/loongson2ef/common/early_printk.c   | 38 -------------------
 arch/mips/loongson2ef/common/init.c           |  1 -
 arch/mips/loongson2ef/common/uart_base.c      |  2 +
 6 files changed, 4 insertions(+), 41 deletions(-)
 delete mode 100644 arch/mips/loongson2ef/common/early_printk.c

diff --git a/arch/mips/include/asm/mach-loongson2ef/loongson.h b/arch/mips/include/asm/mach-loongson2ef/loongson.h
index 622456539add..5008af0a1a19 100644
--- a/arch/mips/include/asm/mach-loongson2ef/loongson.h
+++ b/arch/mips/include/asm/mach-loongson2ef/loongson.h
@@ -21,7 +21,6 @@ extern void mach_prepare_shutdown(void);
 /* environment arguments from bootloader */
 extern u32 cpu_clock_freq;
 extern u32 memsize, highmemsize;
-extern const struct plat_smp_ops loongson3_smp_ops;
 
 /* loongson-specific command line, env and memory initialization */
 extern void __init prom_init_memory(void);
diff --git a/arch/mips/loongson2ef/Kconfig b/arch/mips/loongson2ef/Kconfig
index 66a584a833e5..595dd48e1e4d 100644
--- a/arch/mips/loongson2ef/Kconfig
+++ b/arch/mips/loongson2ef/Kconfig
@@ -23,6 +23,7 @@ config LEMOTE_FULOONG2E
 	select SYS_SUPPORTS_LITTLE_ENDIAN
 	select SYS_SUPPORTS_HIGHMEM
 	select SYS_HAS_EARLY_PRINTK
+	select USE_GENERIC_EARLY_PRINTK_8250
 	select GENERIC_ISA_DMA_SUPPORT_BROKEN
 	select CPU_HAS_WB
 	select LOONGSON_MC146818
@@ -52,6 +53,7 @@ config LEMOTE_MACH2F
 	select ISA
 	select SYS_HAS_CPU_LOONGSON2F
 	select SYS_HAS_EARLY_PRINTK
+	select USE_GENERIC_EARLY_PRINTK_8250
 	select SYS_SUPPORTS_64BIT_KERNEL
 	select SYS_SUPPORTS_HIGHMEM
 	select SYS_SUPPORTS_LITTLE_ENDIAN
diff --git a/arch/mips/loongson2ef/common/Makefile b/arch/mips/loongson2ef/common/Makefile
index 10dd009a20a0..d5ab3e543ea3 100644
--- a/arch/mips/loongson2ef/common/Makefile
+++ b/arch/mips/loongson2ef/common/Makefile
@@ -10,7 +10,6 @@ obj-$(CONFIG_PCI) += pci.o
 #
 # Serial port support
 #
-obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
 obj-$(CONFIG_LOONGSON_UART_BASE) += uart_base.o
 obj-$(CONFIG_LOONGSON_MC146818) += rtc.o
 
diff --git a/arch/mips/loongson2ef/common/early_printk.c b/arch/mips/loongson2ef/common/early_printk.c
deleted file mode 100644
index d90c5e5a0e78..000000000000
--- a/arch/mips/loongson2ef/common/early_printk.c
+++ /dev/null
@@ -1,38 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*  early printk support
- *
- *  Copyright (c) 2009 Philippe Vachon <philippe@cowpig.ca>
- *  Copyright (c) 2009 Lemote Inc.
- *  Author: Wu Zhangjin, wuzhangjin@gmail.com
- */
-#include <linux/serial_reg.h>
-#include <asm/setup.h>
-
-#include <loongson.h>
-
-#define PORT(base, offset) (u8 *)(base + offset)
-
-static inline unsigned int serial_in(unsigned char *base, int offset)
-{
-	return readb(PORT(base, offset));
-}
-
-static inline void serial_out(unsigned char *base, int offset, int value)
-{
-	writeb(value, PORT(base, offset));
-}
-
-void prom_putchar(char c)
-{
-	int timeout;
-	unsigned char *uart_base;
-
-	uart_base = (unsigned char *)_loongson_uart_base;
-	timeout = 1024;
-
-	while (((serial_in(uart_base, UART_LSR) & UART_LSR_THRE) == 0) &&
-			(timeout-- > 0))
-		;
-
-	serial_out(uart_base, UART_TX, c);
-}
diff --git a/arch/mips/loongson2ef/common/init.c b/arch/mips/loongson2ef/common/init.c
index dab3ffda8b14..45512178be77 100644
--- a/arch/mips/loongson2ef/common/init.c
+++ b/arch/mips/loongson2ef/common/init.c
@@ -44,7 +44,6 @@ void __init prom_init(void)
 
 	/*init the uart base address */
 	prom_init_uart_base();
-	register_smp_ops(&loongson3_smp_ops);
 	board_nmi_handler_setup = mips_nmi_setup;
 }
 
diff --git a/arch/mips/loongson2ef/common/uart_base.c b/arch/mips/loongson2ef/common/uart_base.c
index bbfe1095a843..522bea6ad7b0 100644
--- a/arch/mips/loongson2ef/common/uart_base.c
+++ b/arch/mips/loongson2ef/common/uart_base.c
@@ -6,6 +6,7 @@
 
 #include <linux/export.h>
 #include <asm/bootinfo.h>
+#include <asm/setup.h>
 
 #include <loongson.h>
 
@@ -38,4 +39,5 @@ void prom_init_loongson_uart_base(void)
 	}
 
 	_loongson_uart_base = TO_UNCAC(loongson_uart_base);
+	setup_8250_early_printk_port(_loongson_uart_base, 0, 1024);
 }
-- 
2.20.1

[PATCH 5/5] MIPS: Loongson64: Drop setup_pcimap

[Jiaxun Yang]

setup_pcimap is used to setup address windows for Loongson-3
built-in PCI-X controller, but this function is never been used
in the real world and lack of support in kernel.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 arch/mips/loongson64/pci.c | 43 --------------------------------------
 1 file changed, 43 deletions(-)

diff --git a/arch/mips/loongson64/pci.c b/arch/mips/loongson64/pci.c
index 7bbe2388f38e..e84ae20c3290 100644
--- a/arch/mips/loongson64/pci.c
+++ b/arch/mips/loongson64/pci.c
@@ -31,54 +31,11 @@ static struct pci_controller  loongson_pci_controller = {
 	.io_offset	= 0x00000000UL,
 };
 
-static void __init setup_pcimap(void)
-{
-	/*
-	 * local to PCI mapping for CPU accessing PCI space
-	 * CPU address space [256M,448M] is window for accessing pci space
-	 * we set pcimap_lo[0,1,2] to map it to pci space[0M,64M], [320M,448M]
-	 *
-	 * pcimap: PCI_MAP2  PCI_Mem_Lo2 PCI_Mem_Lo1 PCI_Mem_Lo0
-	 *	     [<2G]   [384M,448M] [320M,384M] [0M,64M]
-	 */
-	LOONGSON_PCIMAP = LOONGSON_PCIMAP_PCIMAP_2 |
-		LOONGSON_PCIMAP_WIN(2, LOONGSON_PCILO2_BASE) |
-		LOONGSON_PCIMAP_WIN(1, LOONGSON_PCILO1_BASE) |
-		LOONGSON_PCIMAP_WIN(0, 0);
-
-	/*
-	 * PCI-DMA to local mapping: [2G,2G+256M] -> [0M,256M]
-	 */
-	LOONGSON_PCIBASE0 = 0x80000000ul;   /* base: 2G -> mmap: 0M */
-	/* size: 256M, burst transmission, pre-fetch enable, 64bit */
-	LOONGSON_PCI_HIT0_SEL_L = 0xc000000cul;
-	LOONGSON_PCI_HIT0_SEL_H = 0xfffffffful;
-	LOONGSON_PCI_HIT1_SEL_L = 0x00000006ul; /* set this BAR as invalid */
-	LOONGSON_PCI_HIT1_SEL_H = 0x00000000ul;
-	LOONGSON_PCI_HIT2_SEL_L = 0x00000006ul; /* set this BAR as invalid */
-	LOONGSON_PCI_HIT2_SEL_H = 0x00000000ul;
-
-	/* avoid deadlock of PCI reading/writing lock operation */
-	LOONGSON_PCI_ISR4C = 0xd2000001ul;
-
-	/* can not change gnt to break pci transfer when device's gnt not
-	deassert for some broken device */
-	LOONGSON_PXARB_CFG = 0x00fe0105ul;
-
-#ifdef CONFIG_CPU_SUPPORTS_ADDRWINCFG
-	/*
-	 * set cpu addr window2 to map CPU address space to PCI address space
-	 */
-	LOONGSON_ADDRWIN_CPUTOPCI(ADDRWIN_WIN2, LOONGSON_CPU_MEM_SRC,
-		LOONGSON_PCI_MEM_DST, MMAP_CPUTOPCI_SIZE);
-#endif
-}
 
 extern int sbx00_acpi_init(void);
 
 static int __init pcibios_init(void)
 {
-	setup_pcimap();
 
 	loongson_pci_controller.io_map_base = mips_io_port_base;
 	loongson_pci_mem_resource.start = loongson_sysconf.pci_mem_start_addr;
-- 
2.20.1

Re: [PATCH 0/5] Loongson cleanups

[Paul Burton]

Hello,

Jiaxun Yang wrote:
> Hi all,
> This series reduced duplicated code in Loongson platform.
> 
> 
> 
> Jiaxun Yang (5):
>   MIPS: Drop pmon.h
>   MIPS: Loongson{2ef, 32, 64} convert to generic fw cmdline
>   MIPS: Drop CPU_SUPPORTS_UNCACHED_ACCELERATED
>   MIPS: Loongson2ef: Convert to early_printk_8250
>   MIPS: Loongson64: Drop setup_pcimap
> 
>  arch/mips/Kconfig                             |  3 -
>  .../include/asm/mach-loongson2ef/loongson.h   |  2 -

Series applied to mips-next.

> MIPS: Drop pmon.h
>   commit 28e6b875fdbb
>   https://git.kernel.org/mips/c/28e6b875fdbb
>   
>   Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
>   Signed-off-by: Paul Burton <paulburton@kernel.org>
> 
> MIPS: Loongson{2ef, 32, 64} convert to generic fw cmdline
>   commit 75cac781dca4
>   https://git.kernel.org/mips/c/75cac781dca4
>   
>   Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
>   Signed-off-by: Paul Burton <paulburton@kernel.org>
> 
> MIPS: Drop CPU_SUPPORTS_UNCACHED_ACCELERATED
>   commit 2a5984360b01
>   https://git.kernel.org/mips/c/2a5984360b01
>   
>   Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
>   Signed-off-by: Paul Burton <paulburton@kernel.org>
> 
> MIPS: Loongson2ef: Convert to early_printk_8250
>   commit 574b9a04abfc
>   https://git.kernel.org/mips/c/574b9a04abfc
>   
>   Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
>   Signed-off-by: Paul Burton <paulburton@kernel.org>
> 
> MIPS: Loongson64: Drop setup_pcimap
>   commit 53949e0a65b7
>   https://git.kernel.org/mips/c/53949e0a65b7
>   
>   Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
>   Signed-off-by: Paul Burton <paulburton@kernel.org>

Thanks,
    Paul

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