ramips: Add support for mt7621 to lzma-loader

Signed-off-by: Tobias Schramm <tobleminer@gmail.com>

target/linux/ramips/image/lzma-loader/Makefile

@@ -16,6 +16,7 @@ TARGET_DIR	:=
 FLASH_OFFS	:=
 FLASH_MAX	:=
 BOARD		:=
+PLATFORM	:=
 
 ifeq ($(TARGET_DIR),)
 TARGET_DIR	:= $(KDIR)
@@ -42,7 +43,7 @@ loader-compile: $(PKG_BUILD_DIR)/.prepared
 		FLASH_OFFS=$(FLASH_OFFS) \
 		FLASH_MAX=$(FLASH_MAX) \
 		BOARD="$(BOARD)" \
-		PLATFORM="ralink" \
+		PLATFORM="$(PLATFORM)" \
 		clean all
 
 loader.gz: $(PKG_BUILD_DIR)/loader.bin

target/linux/ramips/image/lzma-loader/src/Makefile

@@ -22,35 +22,39 @@ BOARD		:=
 FLASH_OFFS	:=
 FLASH_MAX	:=
 PLATFORM	:=
+CACHE_FLAGS	:=
 
 CC		:= $(CROSS_COMPILE)gcc
 LD		:= $(CROSS_COMPILE)ld
 OBJCOPY		:= $(CROSS_COMPILE)objcopy
 OBJDUMP		:= $(CROSS_COMPILE)objdump
 
-BIN_FLAGS	:= -O binary -R .reginfo -R .note -R .comment -R .mdebug -S
+
+include $(PLATFORM).mk
+
+BIN_FLAGS	:= -O binary -R .reginfo -R .note -R .comment -R .mdebug \
+		   -R .MIPS.abiflags -S
 
 CFLAGS		= -D__KERNEL__ -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
 		  -fno-strict-aliasing -fno-common -fomit-frame-pointer -G 0 \
 		  -mno-abicalls -fno-pic -ffunction-sections -pipe -mlong-calls \
-		  -fno-common -ffreestanding -fhonour-copts \
+		  -fno-common -ffreestanding -fhonour-copts -nostartfiles \
 		  -mabi=32 -march=mips32r2 \
 		  -Wa,-32 -Wa,-march=mips32r2 -Wa,-mips32r2 -Wa,--trap
-CFLAGS		+= -D_LZMA_PROB32 -DARCH=$(PLATFORM)
+CFLAGS		+= -D_LZMA_PROB32
+CFLAGS		+= -flto
+CFLAGS		+= $(CACHE_FLAGS)
 
 ASFLAGS		= $(CFLAGS) -D__ASSEMBLY__
 
-LDFLAGS		= -static --gc-sections -no-warn-mismatch
-LDFLAGS		+= -e startup -T loader.lds -Ttext $(LZMA_TEXT_START)
+LDFLAGS		= -static -Wl,--gc-sections -Wl,-no-warn-mismatch
+LDFLAGS		+= -Wl,-e,startup -T loader.lds -Wl,-Ttext,$(LZMA_TEXT_START)
+LDFLAGS		+= -flto -fwhole-program -Wl,-z,max-page-size=4096
 
 O_FORMAT 	= $(shell $(OBJDUMP) -i | head -2 | grep elf32)
 
 OBJECTS		:= head.o loader.o cache.o board-$(PLATFORM).o printf.o LzmaDecode.o
 
-include $(PLATFORM).mk
-CFLAGS+=$(CACHE_FLAGS)
-ASFLAGS+=$(CACHE_FLAGS)
-
 ifneq ($(strip $(LOADER_DATA)),)
 OBJECTS		+= data.o
 CFLAGS		+= -DLZMA_WRAPPER=1 -DLOADADDR=$(LOADADDR)
@@ -68,11 +72,6 @@ ifneq ($(strip $(FLASH_MAX)),)
 CFLAGS		+= -DCONFIG_FLASH_MAX=$(FLASH_MAX)
 endif
 
-BOARD_DEF := $(shell echo $(strip $(BOARD)) | tr a-z A-Z | tr - _)
-ifneq ($(BOARD_DEF),)
-CFLAGS		+= -DCONFIG_BOARD_$(BOARD_DEF)
-endif
-
 all: loader.elf
 
 # Don't build dependencies, this may die if $(CC) isn't gcc
@@ -90,7 +89,7 @@ data.o: $(LOADER_DATA)
 	$(LD) -r -b binary --oformat $(O_FORMAT) -T lzma-data.lds -o $@ $<
 
 loader: $(OBJECTS)
-	$(LD) $(LDFLAGS) -o $@ $(OBJECTS)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJECTS)
 
 loader.bin: loader
 	$(OBJCOPY) $(BIN_FLAGS) $< $@
@@ -99,7 +98,7 @@ loader2.o: loader.bin
 	$(LD) -r -b binary --oformat $(O_FORMAT) -o $@ $<
 
 loader.elf: loader2.o
-	$(LD) -e startup -T loader2.lds -Ttext $(LOADADDR) -o $@ $<
+	$(LD) -e startup -T loader2.lds -Ttext $(LOADADDR) -z max-page-size=4096 -o $@ $<
 
 mrproper: clean
 

target/linux/ramips/image/lzma-loader/src/board-mt7621.c

@@ -0,0 +1,39 @@
+/*
+ * Arch specific code for mt7621 based boards, based on code for Ralink boards
+ *
+ * Copyright (C) 2018 Tobias Schramm <tobleminer@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <stddef.h>
+#include <stdint.h>
+#include "config.h"
+
+#define READREG(r)		*(volatile uint32_t *)(r)
+#define WRITEREG(r,v)		*(volatile uint32_t *)(r) = v
+
+#define KSEG1ADDR(_x)		(((_x) & 0x1fffffff) | 0xa0000000)
+
+#define UART_BASE		0xBE000C00
+
+#define UART_TBR_OFFSET		0x00
+#define UART_LSR_OFFSET		0x14
+
+#define UART_LSR_TEMT		(1 << 6)
+
+#define UART_READ(r)		READREG(UART_BASE + (r))
+#define UART_WRITE(r,v)		WRITEREG(UART_BASE + (r), (v))
+
+void board_putc(int ch)
+{
+	while (((UART_READ(UART_LSR_OFFSET)) & UART_LSR_TEMT) == 0);
+	UART_WRITE(UART_TBR_OFFSET, ch);
+	while (((UART_READ(UART_LSR_OFFSET)) & UART_LSR_TEMT) == 0);
+}
+
+void board_init(void)
+{
+}

target/linux/ramips/image/lzma-loader/src/loader.c

@@ -21,6 +21,7 @@
 
 #include <stddef.h>
 #include <stdint.h>
+#include <sys/types.h>
 
 #include "config.h"
 #include "cache.h"
@@ -73,9 +74,10 @@ static unsigned long lzma_outsize;
 static unsigned long kernel_la;
 
 #ifdef CONFIG_KERNEL_CMDLINE
-#define kernel_argc	1
+#define kernel_argc	2
 static const char kernel_cmdline[] = CONFIG_KERNEL_CMDLINE;
 static const char *kernel_argv[] = {
+	NULL,
 	kernel_cmdline,
 	NULL,
 };

target/linux/ramips/image/lzma-loader/src/mt7621.mk

@@ -0,0 +1 @@
+CACHE_FLAGS+=-DCONFIG_ICACHE_SIZE="(32 * 1024)" -DCONFIG_DCACHE_SIZE="(16 * 1024)" -DCONFIG_CACHELINE_SIZE=32