[U-Boot-Users] Problem booting MontaVista 3.0 Linux on IBM 405EP Bubinga board

[Andy Vo]

Hello all,

I am using U-boot with Linux version 2.4.18 but booting hung at =
"Uncompressing Kernel Image...OK".=20

I modified the bd_info structure in the kernel (file =
include/asm-ppc/ppcboot.h) to match the bd_info structure of U-boot =
(file include/asm/uboot.h) as suggested in the U-boot manual. 
The contents of the 2 board info structures =
were almost identical except for the extra entry of "mon_fnc_t =
*bi_mon_fnc;" at the end of the ppcboot.h file of the kernel. I did not =
know if this entry was needed or not so I left it in there. I then =
booted the recompiled kernel but it still died at the same place.

Below is the kernel's bd_info structure from file =
include/asm-ppc/ppcboot.h that I used for the 405EP Bubinga board:

typedef struct bd_info {
unsigned long bi_memstart; /* start of DRAM memory */
unsigned long bi_memsize; /* size of DRAM memory in bytes */
unsigned long bi_flashstart; /* start of FLASH memory */
unsigned long bi_flashsize; /* size of FLASH memory */
unsigned long bi_flashoffset; /* reserved area for startup monitor */
unsigned long bi_sramstart; /* start of SRAM memory */
unsigned long bi_sramsize; /* size of SRAM memory */
#if defined(CONFIG_8xx) || defined(CONFIG_8260)
unsigned long bi_immr_base; /* base of IMMR register */
#endif
unsigned long bi_bootflags; /* boot / reboot flag (for LynxOS) */
unsigned long bi_ip_addr; /* IP Address */
unsigned char bi_enetaddr[6]; /* Ethernet adress */
unsigned short bi_ethspeed; /* Ethernet speed in Mbps */
unsigned long bi_intfreq; /* Internal Freq, in MHz */
unsigned long bi_busfreq; /* Bus Freq, in MHz */
#if defined(CONFIG_8260)
unsigned long bi_cpmfreq; /* CPM_CLK Freq, in MHz */
unsigned long bi_brgfreq; /* BRG_CLK Freq, in MHz */
unsigned long bi_sccfreq; /* SCC_CLK Freq, in MHz */
unsigned long bi_vco; /* VCO Out from PLL, in MHz */
#endif
unsigned long bi_baudrate; /* Console Baudrate */
#if defined(CONFIG_405GP) || defined(CONFIG_405EP)
unsigned char bi_s_version[4]; /* Version of this structure */
unsigned char bi_r_version[32]; /* Version of the ROM (IBM) */
unsigned int bi_procfreq; /* CPU (Internal) Freq, in Hz */
unsigned int bi_plb_busfreq; /* PLB Bus speed, in Hz */
unsigned int bi_pci_busfreq; /* PCI Bus speed, in Hz */
unsigned char bi_pci_enetaddr[6]; /* PCI Ethernet MAC address */
#endif
#if defined(CONFIG_HYMOD)
hymod_conf_t bi_hymod_conf; /* hymod configuration information */
#endif
#if defined(CONFIG_EVB64260)
/* the board has three onboard ethernet ports */
unsigned char bi_enet1addr[6];
unsigned char bi_enet2addr[6];
#endif
#if defined(CONFIG_405GP) || defined(CONFIG_405EP)=20
unsigned int bi_opbfreq; /* OPB clock in Hz */=20
int bi_iic_fast[2]; /* Use fast i2c mode */=20
#endif
mon_fnc_t *bi_mon_fnc; /* Pointer to monitor functions */

} bd_t;

I am fairly new to embedded Linux so any detailed help would be greatly =
appreciated. Sorry for the long email.

Andy


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