s5pv210 linux3.8.3内核移植之二：Uncompressing Linux... done, booting the kernel.问题解决

首先，分析下网上收集的解决方法：

1、uboot和内核的machine type 不匹配

那么uboot的machine type是多少怎么确定呢？打印出来不就知道了。所以在arch/arm/lib/bootm.c文件中添加printf函数，修改代码如下

r2 = gd->bd->bi_boot_params;
printf("machid：0x%x\n",machid);kernel_entry(0, machid, r2);

machine type在u-boot的配置在board/samsung/xxx/xxx.c文件中（xxx表示开发板名字，我的路径为 board/samsung/goni/goni.c）

int board_init(void)
{
	/* Set Initial global variables */
	s5pc110_gpio = (struct s5pc110_gpio *)S5PC110_GPIO_BASE;

	gd->bd->bi_arch_number = MACH_TYPE_GONI;
	gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;

这里MACH_TYPE_GONI宏是没有定义的，如果前面打印出来的machid值不是0xb2e，则在goni.c文件中添加 #define MACH_TYPE_GONI 2862

2、串口驱动没有编译入内核

执行 make menuconfig

查看 Device Drivers --->Character Devices ---> Serial drivers --->

<*> Samsung SoC serial support
[ ] Samsung SoC serial debug
[*] Support for console on Samsung SoC serial port

说明串口驱动已经开启。没问题

3、内核启动参数设置错误

呵呵，我的问题就是出在这里。uboot传递的内核启动参数不对，所以我干脆不用uboot传参数，在内核配置里设置启动参数

make menuconfig

Boot options ---> initrd=0x20800000,8M console=ttySAC1,115200 init=/linuxrc

将 ttySAC1改为ttySAC0, 也就是串口0做控制台。

然后 Kernel command line type选为 (X) Always use the default kernel command string。（默认为内核传参）

修改完成后串口0信息如下：

U-Boot 2012.10 (Jun 08 2015 - 21:41:00)

CPU:    S5PV210@1000MHz
Board:  x210v3
I2C:   ready
DRAM:  512 MiB
WARNING: Caches not enabled
Board PMIC init
MMC:   SAMSUNG SDHCI: 0
Using default environment

In:    serial
Out:   serial
Err:   serial
Hit any key to stop autoboot:  0 
## Booting kernel from Legacy Image at 20008000 ...
   Image Name:   Linux-3.8.3
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    1406024 Bytes = 1.3 MiB
   Load Address: 20008000
   Entry Point:  20008040
   XIP Kernel Image ... OK
OK

Starting kernel ...

machid:0xb2e
Uncompressing Linux... done, booting the kernel.
Booting Linux on physical CPU 0x0
Linux version 3.8.3 (root@crazyrain) (gcc version 4.4.1 (Sourcery G++ Lite 2009q3-67) ) #1 PREEMPT Mon Jun 8 21:42:51 CST 2015
CPU: ARMv7 Processor [412fc082] revision 2 (ARMv7), cr=10c53c7d
CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: GONI
Ignoring tag cmdline (using the default kernel command line)
Memory policy: ECC disabled, Data cache writeback
CPU S5PV210/S5PC110 (id 0x43110220)
S3C24XX Clocks, Copyright 2004 Simtec Electronics
S5PV210: PLL settings, A=1000000000, M=667000000, E=96000000 V=54000000
S5PV210: ARMCLK=1000000000, HCLKM=200000000, HCLKD=166750000
HCLKP=133400000, PCLKM=100000000, PCLKD=83375000, PCLKP=66700000
sclk_dmc: source is sclk_a2m (0), rate is 200000000
sclk_onenand: source is hclk_dsys (1), rate is 83375000
sclk_fimc: source is ext_xtal (0), rate is 24000000
sclk_fimc: source is ext_xtal (0), rate is 24000000
sclk_fimc: source is ext_xtal (0), rate is 24000000
sclk_cam0: source is ext_xtal (0), rate is 24000000
sclk_cam1: source is ext_xtal (0), rate is 24000000
sclk_fimd: source is ext_xtal (0), rate is 24000000
sclk_mfc: source is sclk_a2m (0), rate is 200000000
sclk_g2d: source is sclk_a2m (0), rate is 200000000
sclk_g3d: source is sclk_a2m (0), rate is 200000000
sclk_csis: source is ext_xtal (0), rate is 24000000
sclk_pwi: source is ext_xtal (0), rate is 24000000
sclk_pwm: source is ext_xtal (0), rate is 24000000
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 130048
Kernel command line: root=/dev/ram0 rw ramdisk=8192 initrd=0x20800000,8M console=ttySAC0,115200 init=/linuxrc
PID hash table entries: 2048 (order: 1, 8192 bytes)
Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
__ex_table already sorted, skipping sort
Memory: 512MB = 512MB total
Memory: 508668k/508668k available, 15620k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    vmalloc : 0xa0800000 - 0xff000000   (1512 MB)
    lowmem  : 0x80000000 - 0xa0000000   ( 512 MB)
    modules : 0x7f000000 - 0x80000000   (  16 MB)
      .text : 0x80008000 - 0x8024f700   (2334 kB)
      .init : 0x80250000 - 0x8026d144   ( 117 kB)
      .data : 0x8026e000 - 0x80295540   ( 158 kB)
       .bss : 0x80295540 - 0x802c6130   ( 195 kB)
SLUB: Genslabs=11, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
NR_IRQS:208
VIC @f6000000: id 0x00041192, vendor 0x41
VIC @f6010000: id 0x00041192, vendor 0x41
VIC @f6020000: id 0x00041192, vendor 0x41
VIC @f6030000: id 0x00041192, vendor 0x41
sched_clock: 32 bits at 33MHz, resolution 29ns, wraps every 128784ms
Console: colour dummy device 80x30
Calibrating delay loop... 663.55 BogoMIPS (lpj=1658880)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
Setting up static identity map for 0x201bdec0 - 0x201bdf18
DMA: preallocated 256 KiB pool for atomic coherent allocations
Registered chained gpio int handler for interrupt 62.
Registered interrupt support for gpio group 18.
S5PV210: Initializing architecture
bio: create slab <bio-0> at 0
SCSI subsystem initialized
Switching to clocksource s5p_clocksource_timer
Trying to unpack rootfs image as initramfs...
rootfs image is not initramfs (junk in compressed archive); looks like an initrd
Freeing initrd memory: 8192K
ROMFS MTD (C) 2007 Red Hat, Inc.
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
dma-pl330 dma-pl330.0: PERIPH_ID 0x0, PCELL_ID 0x0 !
dma-pl330: probe of dma-pl330.0 failed with error -22
dma-pl330 dma-pl330.1: PERIPH_ID 0x0, PCELL_ID 0x0 !
dma-pl330: probe of dma-pl330.1 failed with error -22
Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
s5pv210-uart.0: ttySAC0 at MMIO 0xe2900000 (irq = 74) is a S3C6400/10
console [ttySAC0] enabled
s5pv210-uart.1: ttySAC1 at MMIO 0xe2900400 (irq = 75) is a S3C6400/10
s5pv210-uart.2: ttySAC2 at MMIO 0xe2900800 (irq = 76) is a S3C6400/10
s5pv210-uart.3: ttySAC3 at MMIO 0xe2900c00 (irq = 77) is a S3C6400/10
brd: module loaded
loop: module loaded
mousedev: PS/2 mouse device common for all mice
VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 2
RAMDISK: Couldn't find valid RAM disk image starting at 0.
List of all partitions:
No filesystem could mount root, tried:  ext2 cramfs vfat msdos romfs
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0)
[<80014988>] (unwind_backtrace+0x0/0xfc) from [<801bab74>] (panic+0x98/0x1f0)
[<801bab74>] (panic+0x98/0x1f0) from [<80250ec0>] (mount_block_root+0x2ec/0x300)
[<80250ec0>] (mount_block_root+0x2ec/0x300) from [<802510c4>] (prepare_namespace+0x190/0x1cc)
[<802510c4>] (prepare_namespace+0x190/0x1cc) from [<801ba548>] (kernel_init+0x8/0xe8)
[<801ba548>] (kernel_init+0x8/0xe8) from [<8000ecd8>] (ret_from_fork+0x14/0x3c)


为了调试内核，接下来得做个简单的根文件系统，待续。。。

原文链接：https://blog.csdn.net/u010346967/article/details/46411211