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modification the hal_platform_setup.h file


Hi, there


Now I am modifing the ecos source code(hal_platform_setup.h) for a
custom board with AT91FR4081(ROMRAM version), I build the ecos library
for eb40 and  made the following change:


-------------------------------------------------------------------------

#include <cyg/hal/plf_io.h>

#if defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_ROMRAM)
ldr     r0,=AT91_SF             //* enable external RAM access
ldr     r1,=0x00000001
str     r1,[r0,#AT91_SF_MMR]


.macro  _setup
ldr     r10,=_InitMemory        // Initialize memory controller
movs    r0,pc,lsr #20           // If ROM startup, PC < 0x100000
moveq   r10,r10,lsl #12         //   mask address to low 20 bits
moveq   r10,r10,lsr #12
ldmia   r10!,{r0-r9,r11-r12}    // Table of initialization constants
#if defined(CYG_HAL_STARTUP_ROMRAM)
ldr     r10,=0x0000FFFF
and     r12,r12,r10
ldr     r10,=0x01000000
orr     r12,r12,r10
#endif
stmia   r11!,{r0-r9}            // Write to controller
mov     pc,r12                  // Change address space, break pipeline
_InitMemory:
.long   0x01002535  // 0x01000000, 16MB,  2 cycles added after transfer,
16-bit, 6 wait states
.long   0x020022AD  // * 0x02000000, 16MB,  0 cycles added after transfer,
16-bit, 1 wait state
.long   0x03003535  // * modified for zvc board
.long   0x04000535  // unused
.long   0x05000535  // unused
.long   0x06000535  // unused
.long   0x07000535  // unused
.long   0x08000535  // unused
.long   0x00000001  // REMAP commande
.long   0x00000006  // 7 memory regions, standard read
.long   AT91_EBI    // External Bus Interface address
.long   10f         // address where to jump
10:

#if defined(CYG_HAL_STARTUP_ROMRAM)
ldr     r0,=0x01000000          // *Relocate FLASH/ROM to on-chip RAM
ldr     r1,=0x00100000         // RAM base & length
ldr     r2,=0x00120000
20:     ldr     r3,[r0],#4
        str     r3,[r1],#4
        cmp     r1,r2
        bne     20b
        ldr     r0,=30f
        mov     pc,r0
30:
#endif      <---------- seems program stops
here!!!!!!------------------------

ldr     r0,=AT91_PS             // Power saving interface
ldr     r1,=0xFFFFFFFF          // Enable all peripheral [clocks]
str     r1,[r0,#AT91_PS_PCER]
ldr     r0,=AT91_PIO            // * enable able PIO (so peripherals can use
bits)
ldr     r1,=0xFB9F3FFF
str     r1,[r0,#AT91_PIO_PER]
ldr     r1,=0x00460C000          // *disable ports for UART, FIQ, EINT,
Timer clocks
str     r1,[r0,#AT91_PIO_PDR]
ldr     r1,=0xFA1021BF
str     r1,[r0,#AT91_PIO_OER]

ldr     r0,=AT91_USART0                // related setting for USART
ldr     r1,=0x0000005
str     r1,[r0,#AT91_US_CR]
ldr     r1,=0x000008C0
str     r1,[r0,#AT91_US_MR]
ldr     r1,=0x00000082
str     r1,[r0,#AT91_US_BRG]
ldr     r1,=0xFFFFFFFF
str     r1,[r0,#AT91_US_IDR]
ldr     r0,=AT91_AIC                // disable the AIC interrupr response
ldr     r1,=0xFFFFFFFF
str     r1,[r0,#AT91_AIC_IDCR]
ldr     r0,=AT91_SF               // disable the AIC interrupr response
ldr     r1,=0x20
str     r1,[r0,#AT91_SF_PMR]
.endm

#define CYGSEM_HAL_ROM_RESET_USES_JUMP
#define PLATFORM_SETUP1     _setup
#else
#define PLATFORM_SETUP1
#endif


----------------------------------------------------------------------------
--------------------

Also, I updated the plf_io file to add more Macros,  after I program the
flash memory
and boot from that custom board, I found some registers could be set
successfully, some
could not( please look the above source code),also I checked the RAM and
found the code
has been copied from flash memory to RAM successfully.

I could not figure out why program stops there (see the above code),I
changed the register
settings and the start address of the flash memory, besides those, is there
any thing I
need to change also? Thanks so much


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