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#ifndef CYGONCE_HAL_PLATFORM_SETUP_H

#define CYGONCE_HAL_PLATFORM_SETUP_H

/*=============================================================================

//

//      hal_platform_setup.h

//

//      Platform specific support for HAL (assembly code)

//

//=============================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

//

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//

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// or inline functions from this file, or you compile this file and link it

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//####ECOSGPLCOPYRIGHTEND####

//=============================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas

// Date:         2000-05-08

// Purpose:      Intel SA1110/Assabet platform specific support routines

// Description:

// Usage:        #include <cyg/hal/hal_platform_setup.h>

//     Only used by "vectors.S"

//

//####DESCRIPTIONEND####

//

//===========================================================================*/

#include <pkgconf/system.h>             // System-wide configuration info

#include CYGBLD_HAL_VARIANT_H           // Variant (SA11x0) specific configuration

#include CYGBLD_HAL_PLATFORM_H          // Platform specific configuration

#include <cyg/hal/hal_sa11x0.h>         // Variant specific hardware definitions

#include <cyg/hal/hal_mmu.h>            // MMU definitions

#include <cyg/hal/assabet.h>            // Platform specific hardware definitions

#if defined(CYG_HAL_STARTUP_ROM)

#define PLATFORM_SETUP1 _platform_setup1

#define CYGHWR_HAL_ARM_HAS_MMU

#if (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 59000)

#define SA11X0_PLL_CLOCK 0x0        

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 73700)

#define SA11X0_PLL_CLOCK 0x1

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 88500)

#define SA11X0_PLL_CLOCK 0x2        

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 103200) 

#define SA11X0_PLL_CLOCK 0x3        

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 118000)

#define SA11X0_PLL_CLOCK 0x4        

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 132700)

#define SA11X0_PLL_CLOCK 0x5        

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 147500)

#define SA11X0_PLL_CLOCK 0x6        

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 162200)

#define SA11X0_PLL_CLOCK 0x7        

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 176900)

#define SA11X0_PLL_CLOCK 0x8        

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 191700)

#define SA11X0_PLL_CLOCK 0x9        

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 206400)

#define SA11X0_PLL_CLOCK 0xA        

#elif (CYGHWR_HAL_ARM_SA11X0_PROCESSOR_CLOCK == 221200)

#define SA11X0_PLL_CLOCK 0xB        

#else

#error Invalid processor clock speed

#endif                

// This macro represents the initial startup code for the platform        

        .macro  _platform_setup1

        // Turn off LEDs

        ldr     r1,=SA1110_BOARD_CONTROL

        ldr     r2,=SA1110_BCR_MIN

        orr     r2,r2,#SA1110_BCR_RED_LED

        orr     r2,r2,#SA1110_BCR_GREEN_LED

        str     r2,[r1]

        // Set up GPIO to read hardware configuration

        ldr     r1,=SA11X0_GPIO_PIN_DIRECTION

        ldr     r2,=0x0807A7FC

        str     r2,[r1]

        ldr     r3,=SA11X0_GPIO_PIN_OUTPUT_SET

        ldr     r2,=0x2FC               // Bits 2..9

        str     r2,[r3]                 // Requests hardware configuration

        ldr     r2,=0x0807A400          // Reconfigure 2..9 as inputs

        str     r2,[r1]

        ldr     r3,=SA11X0_GPIO_PIN_LEVEL

        mov     r2,#100

10:     ldr     r9,[r3]                 // Read multiple times to settle

        subs    r2,r2,#1

        bne     10b

        ldr     r2,=0x0807A7FC          // Restore proper pin configuration

        str     r2,[r1]

        ldr     r3,=SA11X0_GPIO_PIN_OUTPUT_SET

        ldr     r2,=0x10000             // Enable high power mode

        str     r2,[r3]

        // Disable clock switching

        mcr     p15,0,r0,\

                SA11X0_TEST_CLOCK_AND_IDLE_REGISTER,\

                SA11X0_DISABLE_CLOCK_SWITCHING_RM,\

                SA11X0_DISABLE_CLOCK_SWITCHING_OPCODE

        // Set up processor clock

        ldr     r1,=SA11X0_PWR_MGR_PLL_CONFIG

        ldr     r2,=SA11X0_PLL_CLOCK

        str     r2,[r1]

        // Turn clock switching back on

        mcr     p15,0,r0,\

                SA11X0_TEST_CLOCK_AND_IDLE_REGISTER,\

                SA11X0_ENABLE_CLOCK_SWITCHING_RM,\

                SA11X0_ENABLE_CLOCK_SWITCHING_OPCODE

        nop

        nop

        // Turn on Red LED

        ldr     r1,=SA1110_BOARD_CONTROL

        ldr     r2,=SA1110_BCR_MIN

        bic     r2,r2,#SA1110_BCR_RED_LED

        orr     r2,r2,#SA1110_BCR_GREEN_LED

        str     r2,[r1]

        // Pause

        ldr     r1,=100000

10:     sub     r1,r1,#1

        cmp     r1,#0

        bne     10b

        // Initialize DRAM controller

        ldr     r1,=dram_table

        ldr     r2,=__exception_handlers

        sub     r1,r1,r2

        ldr     r2,[r1],#4                      // First control register

10:     ldr     r3,[r1],#4

        str     r3,[r2]

        ldr     r2,[r1],#4                      // Next control register

        cmp     r2,#0

        bne     10b

        ldr     r1,=SA1110_BOARD_CONTROL

        ldr     r2,=SA1110_BCR_MIN

        orr     r2,r2,#SA1110_BCR_RED_LED

        bic     r2,r2,#SA1110_BCR_GREEN_LED

        str     r2,[r1]

        // Enable UART

        ldr     r1,=SA1110_GPCLK_CONTROL_0

        ldr     r2,=SA1110_GPCLK_SUS_UART

        str     r2,[r1]

        // Release DRAM hold (set by RESET)

        ldr     r1,=SA11X0_PWR_MGR_SLEEP_STATUS

        ldr     r2,=SA11X0_DRAM_CONTROL_HOLD

        str     r2,[r1]

        // Perform 8 reads from unmapped/unenabled DRAM

        ldr     r1,=SA11X0_RAM_BANK0_BASE

        ldr     r2,[r1]

        ldr     r2,[r1]

        ldr     r2,[r1]

        ldr     r2,[r1]

        ldr     r2,[r1]

        ldr     r2,[r1]

        ldr     r2,[r1]

        ldr     r2,[r1]

        // Enable DRAM controller

        ldr     r1,=SA11X0_DRAM_CONFIGURATION

        ldr     r2,=0x72547255

        str     r2,[r1]

        b       19f

// DRAM controller initialization        

dram_table:

        .word   SA11X0_DRAM0_CAS_0,           0xAAAAAA7F

        .word   SA11X0_DRAM0_CAS_1,           0xAAAAAAAA

        .word   SA11X0_DRAM0_CAS_2,           0xAAAAAAAA

#ifdef CYGSEM_HAL_ARM_SA11X0_ASSABET_NEPONSET_TIMINGS

        .word   SA11X0_STATIC_CONTROL_0,      0x4B384370

        .word   SA11X0_STATIC_CONTROL_1,      0x22212419

#endif

        .word   SA11X0_EXP_BUS_CONFIGURATION, 0x994A994A

        .word   SA11X0_REFRESH_CONFIGURATION, 0x49FC0327

        .word   SA11X0_DRAM2_CAS_0,           0xAAAAAA7F

        .word   SA11X0_DRAM2_CAS_1,           0xAAAAAAAA

        .word   SA11X0_DRAM2_CAS_2,           0xAAAAAAAA

#ifdef CYGSEM_HAL_ARM_SA11X0_ASSABET_NEPONSET_TIMINGS

        .word   SA11X0_STATIC_CONTROL_2,      0x42196669

#endif

        .word   SA11X0_SMROM_CONFIGURATION,   0xAFCCAFCC

        .word   SA11X0_DRAM_CONFIGURATION,    0x72547254        // Disabled

        .word   0, 0

19:

        // Wakeup from deep sleep mode

        ldr     r1,=SA11X0_RESET_STATUS

        ldr     r2,[r1]

        cmp     r2,#SA11X0_SLEEP_MODE_RESET

        bne     45f

        ldr     r1,=SA11X0_PWR_MGR_SCRATCHPAD

        ldr     r1,[r1]

        mov     pc,r1

        nop

45:     nop

        // Release peripheral hold (set by RESET)

        ldr     r1,=SA11X0_PWR_MGR_SLEEP_STATUS

        ldr     r2,=SA11X0_PERIPHERAL_CONTROL_HOLD

        str     r2,[r1]

        // Set up a stack [for calling C code]

        ldr     r1,=__startup_stack

        ldr     r2,=SA11X0_RAM_BANK0_BASE

        orr     sp,r1,r2

        // Create MMU tables

        bl      hal_mmu_init

        // Turn on green LED

        ldr     r1,=SA1110_BOARD_CONTROL

        ldr     r2,=SA1110_BCR_MIN

        orr     r2,r2,#SA1110_BCR_RED_LED

        bic     r2,r2,#SA1110_BCR_GREEN_LED

        str     r2,[r1]

        // Enable MMU

        ldr     r2,=10f

        ldr     r1,=MMU_Control_Init|MMU_Control_M

        mcr     MMU_CP,0,r1,MMU_Control,c0

        mov     pc,r2    /* Change address spaces */

        nop

        nop

        nop

10:

        // Turn on both LEDs

        ldr     r1,=SA1110_BOARD_CONTROL

        ldr     r2,=SA1110_BCR_MIN

        bic     r2,r2,#SA1110_BCR_RED_LED

        bic     r2,r2,#SA1110_BCR_GREEN_LED

        str     r2,[r1]

        // Save shadow copy of BCR, also hardware configuration

        ldr     r1,=_assabet_BCR

        str     r2,[r1]

        ldr     r1,=_assabet_CFG

        str     r9,[r1]                // Saved far above...

        .endm

#else // defined(CYG_HAL_STARTUP_ROM)

#define PLATFORM_SETUP1

#endif

#define PLATFORM_VECTORS         _platform_vectors

        .macro  _platform_vectors

        .globl  _assabet_BCR, _assabet_CFG

_assabet_BCR:   .long   0       // Board Control register shadow

_assabet_CFG:   .long   0       // Board Configuration (read at RESET)

        .endm

/*---------------------------------------------------------------------------*/

/* end of hal_platform_setup.h                                               */

#endif /* CYGONCE_HAL_PLATFORM_SETUP_H */