📄 hal_platform_setup.h
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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)////=============================================================================//####COPYRIGHTBEGIN####// // ------------------------------------------- // The contents of this file are subject to the Red Hat eCos Public License // Version 1.1 (the "License"); you may not use this file except in // compliance with the License. You may obtain a copy of the License at // http://www.redhat.com/ // // Software distributed under the License is distributed on an "AS IS" // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the // License for the specific language governing rights and limitations under // the License. // // The Original Code is eCos - Embedded Configurable Operating System, // released September 30, 1998. // // The Initial Developer of the Original Code is Red Hat. // Portions created by Red Hat are // Copyright (C) 1998, 1999, 2000 Red Hat, Inc. // All Rights Reserved. // ------------------------------------------- // //####COPYRIGHTEND####//=============================================================================//#####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,#10010: 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,=10000010: 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 register10: 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// .word SA11X0_STATIC_CONTROL_0, 0x4B384B38// .word SA11X0_STATIC_CONTROL_1, 0x22212419 .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// .word SA11X0_STATIC_CONTROL_2, 0x42194449 .word SA11X0_SMROM_CONFIGURATION, 0xAFCCAFCC .word SA11X0_DRAM_CONFIGURATION, 0x72547254 // Disabled .word 0, 019: // 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 nop10: // 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 */⌨️ 快捷键说明
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