Porting the kernel to s3c2440-EEWORLD

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Try to port the kernel to s3c2440

1. Environment Construction:

1. Download resource pack:

linux-3.0.12.tar.gz （https://www.kernel.org/pub/linux/kernel/v3.0/）

ARM-Linux GCC 4.4.3（http://arm9download.cncncn.com/mini2440/linux/arm-linux-gcc-4.4.3-20100728.tar.gz）

2. Unzip the kernel:

1.tar -xzvf linux-3.0.12.tar.gz

2.cd linux-3.0.12

3.make s3c2410_defconfig

4. Modify Makefile

195行 ARCH ?= arm

196 行CROSS_COMPILE ?= arm-linux-

5. Make menuconfig to add the driver support you need

If the error message Unable to find the ncurses libraries or the is displayed here, you need to install ncurses-devel

Under Ubuntu: sudo apt-get install ncurses

6. Modify the crystal oscillator frequency:

The kernel default crystal oscillator is 16M, but most development boards are 12M, which needs to be modified, otherwise there will be garbled code phenomenon

arch/arm/mach-s3c2440/mach-smdk2440.c

160static void __init smdk2440_map_io(void)

161 {

162 s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));

163 s3c24xx_init_clocks(12000000);

164 s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs)) ;

165 }

7. Modify partition

smdk_default_nand_part[] structure array in arch/arm/plat-s3c24xx/common-smdk.c

My partitions are as follows:

111 static struct mtd_partition smdk_default_nand_part[] = {

112 [0] = {

113 .name = "bootloader",

114 .size = SZ_256K,

115 .offset = 0,

116 },

117 [1] = {

118 .name = "params",

119 .offset = MTDPART_OFS_APPEND,

120 .size = SZ_128K,

121 },

122 [2] = {

123 .name = "kernel",

124 .offset = MTDPART_OFS_APPEND,

125 .size = SZ_4M,

126 },

127 [3] = {

128 .name = "roots",

129 .offset = MTDPART_OFS_APPEND,

130 .size = MTDPART_SIZ_FULL,

131 },

132 };

7.make uImage

8. Burn arch/arm/boot/uImage to the development board

The kernel at this time does not support the yaff file system, but can burn the jffs2 file system

Reference address：Porting the kernel to s3c2440

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