platform.h

Ibmstb02500 miniboot 源码

/* openbios/arch/vesta/olivia/platform.h, stb-bios */
/*-----------------------------------------------------------------------------+
|
|       This source code has been made available to you by IBM on an AS-IS
|       basis.  Anyone receiving this source is licensed under IBM
|       copyrights to use it in any way he or she deems fit, including
|       copying it, modifying it, compiling it, and redistributing it either
|       with or without modifications.  No license under IBM patents or
|       patent applications is to be implied by the copyright license.
|
|       Any user of this software should understand that IBM cannot provide
|       technical support for this software and will not be responsible for
|       any consequences resulting from the use of this software.
|
|       Any person who transfers this source code or any derivative work
|       must include the IBM copyright notice, this paragraph, and the
|       preceding two paragraphs in the transferred software.
|
|       COPYRIGHT   I B M   CORPORATION 1995
|       LICENSED MATERIAL  -  PROGRAM PROPERTY OF I B M
+-----------------------------------------------------------------------------*/
/*-----------------------------------------------------------------------------+
|
|  File Name:   platform.h
|
|  Function:    STB BIOS architecture depdendent settings for Olivia / Vesta.
|
|  Author:      Yudong Yang
|
|  Change Activity-
|
|  Date        Description of Change                                       BY
|  ---------   ---------------------                                       ---
|  30-Jan-02   Created                                                     YYD
|  21-Jun-02   Increased stack size and enabled dynamic .bss+.data size    YYD
|
+-----------------------------------------------------------------------------*/


/*-----------------------------------------------------------------------------+
| Defines for common addresses for RAM
+-----------------------------------------------------------------------------*/
// please note that initbrd.s may need to be changed too
#define RAM_BANK_0        0x00000000
#define RAM_BANK_1        0xA0000000

#define RAM_BANK_0_SIZE   0x02000000
#define RAM_BANK_1_SIZE   0x01000000

/*-----------------------------------------------------------------------------+
| Defines for common addresses for FLASH 
+-----------------------------------------------------------------------------*/

// The size of flash memory
#define FLASH_START        0x7FC00000    // start address of flash memory
#define FLASH_DEV_SIZE     0x00200000    // size of each flash device
#define FLASH_TOTAL_SIZE   0x00400000    // total size of flash memory
#define FLASH_ADDR_MASK    0x7fffffff    // flash device address mask


/*-----------------------------------------------------------------------------+
| Defines for common addresses for BIOS 
+-----------------------------------------------------------------------------*/
// STB-BIOS Memory Map:
// RAM_BANK_1
//   .data      // the address is also specified in root/mapfile2 and root/mapfile.gnu
//   .sdata
//   .bss
//   .sbss
//   C Runtime Stack
//   Interrupt Service Stack
//   Flash Update Code in RAM
//   Flash Update Buffer
//   Available RAM
//   VIDEO_RAM_ADDRESS   if BOOTLOGO is enabled
// In Flash ROM
// BIOS_START
//   .text     // the address is also specified in root/mapfile2 and root/mapfile.gnu
//   .rodata

#define BIOS_START	        0xfffe0000       // the start address of BIOS .text segment
    // should be exactly the same as specified in mapfile2 / mapfile.gnu.  (STB-BIOS root dir)
#define BIOS_SIZE               0x00020000   // 128K BIOS AREA      Please make sure this is the correct one

#define BIOS_DATA_ADDR         RAM_BANK_1    // BIOS_DATA now start at this point
#define BIOS_STACK_SIZE         0x10000	     // C runtime Stack size
#define BIOS_INT_STACK_SIZE     0x2000	     // interrupt handler Stack size

#ifndef  __ASSEMBLER__      // defined for assembler preprocessor

extern unsigned int BIOS_DATA_SIZE;      // data + bss segment size, rounded to 4K boundary
#define BIOS_FLASH_CODE_SIZE    0x1000  // size of flash code which is needed to be placed in memory
#define BIOS_FLASH_CODE_ADDR    (RAM_BANK_1 + BIOS_STACK_SIZE + BIOS_INT_STACK_SIZE + BIOS_DATA_SIZE)
#define BIOS_FLASH_BUFFER_SIZE  0x10000 // 64kB buffer for writing flash
#define BIOS_FLASH_BUFFER_ADDR  (BIOS_FLASH_CODE_ADDR + BIOS_FLASH_CODE_SIZE)
#define RAM_ADDRESS             (BIOS_FLASH_BUFFER_ADDR + BIOS_FLASH_BUFFER_SIZE)  // free unused memory address

#endif   // __ASSEMBLER__



/*-----------------------------------------------------------------------------+
| Flash address of the BIOS config data area (resides in FLASH ROM).
+-----------------------------------------------------------------------------*/
#define BIOS_CONFIG_START   FLASH_START
#define BIOS_CONFIG_SIZE    (0x00010000)  // 64K config data
#define BIOS_MANAGED_FLASH_SIZE (0x400000)  // 4M Bytes 

/*-----------------------------------------------------------------------------+
| Flash address of the BIOS VPD config data area (resides in FLASH ROM).
+-----------------------------------------------------------------------------*/
#define VPD_ADDR        BIOS_CONFIG_START  // VPD data area
#define VPD_SIZE        (0x1000)           // VPD data area size

/*-----------------------------------------------------------------------------+
| Flash address of the "NVRAM" data area (resides in FLASH ROM).
+-----------------------------------------------------------------------------*/
#define NVRAM_START     (VPD_ADDR + VPD_SIZE)
#define NVRAM_SIZE	(0x1000)

/*-----------------------------------------------------------------------------+
| Flash address of the BOOTLOGO data area (resides in FLASH ROM).
+-----------------------------------------------------------------------------*/
#define BOOTLOGO_FLASH_START (NVRAM_START + NVRAM_SIZE) 
#define BOOTLOGO_FLASH_SIZE  (BIOS_CONFIG_SIZE - NVRAM_SIZE - VPD_SIZE)

// The flash memory region can be used by boot image
#define IMAGE_FLASH_OFFSET       BIOS_CONFIG_SIZE   // leave starting 64k for misc use
#define IMAGE_FLASH_MAX          (BIOS_MANAGED_FLASH_SIZE - (BIOS_SIZE + IMAGE_FLASH_OFFSET)) // 0x003d0000
#define IMAGE_FLASH_START        (BIOS_CONFIG_START + IMAGE_FLASH_OFFSET | 0x80000000)

/*-----------------------------------------------------------------------------+
| Defines for common addresses for BOOT Image 
+-----------------------------------------------------------------------------*/
#define ENTRY_PT_MIN             0x0000A000  // the minimal entry point location of boot image



/*-----------------------------------------------------------------------------+
| Defines for addresses of BOOTLOGO video buffer
+-----------------------------------------------------------------------------*/
// we need 1MB alignment as required by Vesta chip's segmented memory management of OSD
#define VIDEO_RAM_ADDRESS  (RAM_BANK_1 + 8*1024*1024)	// RAM_BANK1 + 4 MByte



// Ethernet interrupt
#define ENET_INT	EXI_I0		// olivia use ext int 0


#define PLATFORM_SUPPORT_VERSION  "1.01 (Jun/24/2002)"