#ifndef CYGONCE_HAL_PLATFORM_SETUP_H
#define CYGONCE_HAL_PLATFORM_SETUP_H

/*=============================================================================
//
//      hal_platform_setup.h
//
//      Platform specific support for HAL (assembly code)
//
//=============================================================================
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//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   gthomas
// Contributors:gthomas, tdrury, nickg
// Date:        2001-07-12
// Purpose:     AT91/EB42 platform specific support routines
// Description:
// Usage:       #include <cyg/hal/hal_platform_setup.h>
//
//####DESCRIPTIONEND####
//
//===========================================================================*/

#include <cyg/hal/var_io.h>

//===========================================================================*/
                
        .macro  _led_init
        ldr     r0,=AT91_PIOB
        ldr     r1,=0x0000FF00
        str     r1,[r0,#AT91_PIO_PER]
        str     r1,[r0,#AT91_PIO_OER]
        _led    0
        _led    15
        .endm
        
        .macro _led y
        ldr     r0,=AT91_PIOB
        ldr     r1,=0x0000FF00
        str     r1,[r0,#AT91_PIO_SODR]
        ldr     r1,=(\y<<8)
        str     r1,[r0,#AT91_PIO_CODR]
#if 0
        mov     r0,#0x00100000
1:      sub     r0,r0,#1
        cmp     r0,#0
        bne     1b
#endif
        .endm

        .macro  _pclock_init
        ldr     r0,=AT91_PMC            // Power saving interface
        ldr     r1,=0xFFFFFFFF          // Enable all peripheral [clocks]
        str     r1,[r0,#AT91_PMC_PCER]
        .endm

        .macro  _pio_init
        ldr     r0,=AT91_PIOA           // Disable PIO (so peripherals can use bits)
        ldr     r1,=0x000007E0          // Enable UARTS
        str     r1,[r0,#AT91_PIO_PDR]
        .endm
                
#define CYGHWR_LED_MACRO _led \x

//===========================================================================*/
                        
#if defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_ROMRAM)


#define AT91_PMC_CGMR_INIT0     AT91_PMC_CGMR_PRES_NONE         |       \
                                AT91_PMC_CGMR_PLLB              |       \
                                AT91_PMC_CGMR_PLL_MUL(999)      |       \
                                AT91_PMC_CGMR_PLL_CNT(197)

#define AT91_PMC_CGMR_INIT1     AT91_PMC_CGMR_INIT0             |       \
                                AT91_PMC_CGMR_MCKO_ENA          |       \
                                AT91_PMC_CGMR_MCK_MCK           |       \
                                AT91_PMC_CGMR_CSS_PLL

                        
        .macro  _setup

        _led_init
        
        
        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 after transfer, 16-bit, 6 wait states
        .long   0x02002121  // 0x02000000, 16MB,  0 cycles after transfer, 16-bit, 1 wait state
        .long   0x20003E3E  // 0x20000000, 1MB,   7 cycles after transfer, 8-bit, 8 wait states
        .long   0x30000000  // unused
        .long   0x40000000  // unused
        .long   0x50000000  // unused
        .long   0x60000000  // unused
        .long   0x70000000  // 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:

        // Change system frequency from 32kHz to 32MHz.

        // First enable the PLL
        ldr     r2,=AT91_PMC
        ldr     r3,=AT91_PMC_CGMR_INIT0
        str     r3,[r2,#AT91_PMC_CGMR]

        // Wait for PLL to stabilize
        mov     r4,#AT91_PMC_SR_LOCK
2:
        ldr     r3,[r2,#AT91_PMC_SR]
        cmp     r3,r4
        bne     2b

        // Now, switch CPU clock from Slow Clock to PLL 
        ldr     r3,=AT91_PMC_CGMR_INIT1
        str     r3,[r2,#AT91_PMC_CGMR]

        // All done, we should be running at 32MHz now
        
#if defined(CYG_HAL_STARTUP_ROMRAM)
        ldr     r0,=0x01000000          // Relocate FLASH/ROM to on-chip RAM
        ldr     r1,=0x02000000          // RAM base & length
        ldr     r2,=0x02010000
20:     ldr     r3,[r0],#4
        str     r3,[r1],#4
        cmp     r1,r2
        bne     20b
        ldr     r0,=30f
        mov     pc,r0
30:
#endif
        _pclock_init
        _pio_init
        .endm

#define CYGSEM_HAL_ROM_RESET_USES_JUMP

#else

        .macro  _setup
        _led_init
        _pclock_init
        _pio_init        
        .endm
        
#endif

#define PLATFORM_SETUP1     _setup

        
//-----------------------------------------------------------------------------
// end of hal_platform_setup.h
#endif // CYGONCE_HAL_PLATFORM_SETUP_H
