📄 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)
//
//=============================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
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//
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//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): msalter
// Contributors: msalter
// Date: 2002-12-10
// Purpose: Intel XScale IXPD 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 specific configuration
#include CYGBLD_HAL_PLATFORM_H // Platform specific configuration
#include <cyg/hal/hal_ixp425.h> // Variant specific hardware definitions
#include <cyg/hal/hal_mmu.h> // MMU definitions
#include <cyg/hal/hal_mm.h> // more MMU definitions
#include <cyg/hal/ixdp425.h> // Platform specific hardware definitions
// ------------------------------------------------------------------------
// Convenience macros for setting up page table
//
.macro IXP_MAP_SDRAM va, c, b, x, p
XSCALE_MMU_SECTION SDRAM_PHYS_BASE>>20, \va>>20, SDRAM_SIZE>>20, \c, \b, 3, \x, \p
.endm
.macro IXP_MAP_EXP_V n, va, sz, c, b, x, p
XSCALE_MMU_SECTION (0x500 + ((IXP425_EXP_CS_SIZE * \n) >> 20)), \va>>20, \sz>>20, \c, \b, 3, \x, \p
.endm
.macro IXP_MAP_EXP n, sz, c, b, x, p
IXP_MAP_EXP_V \n, (0x50000000 + (IXP425_EXP_CS_SIZE * \n)), \sz, \c, \b, \x, \p
.endm
.macro IXP_MAP_IO addr, sz
XSCALE_MMU_SECTION \addr>>20, \addr>>20, \sz>>20, 0, 0, 3, 0, 0
.endm
#if defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_ROMRAM)
#define PLATFORM_SETUP1 _platform_setup1
#define CYGHWR_HAL_ARM_HAS_MMU
// ------------------------------------------------------------------------
// Define macro used to diddle the LEDs during early initialization.
// Can use r0+r1. Argument in \x.
#define CYGHWR_LED_MACRO DISPLAY \x, r0, r1
// Delay a bit
.macro DELAY cycles, reg0
ldr \reg0, =\cycles
subs \reg0, \reg0, #1
subne pc, pc, #0xc
.endm
// ------------------------------------------------------------------------
// This macro represents the initial startup code for the platform
.macro _platform_setup1
#ifdef CYGHWR_HAL_ARM_BIGENDIAN
// set big-endian
mrc p15, 0, r0, c1, c0, 0
orr r0, r0, #0x80
mcr p15, 0, r0, c1, c0, 0
CPWAIT r0
#endif
ldr r0,=(CPSR_IRQ_DISABLE|CPSR_FIQ_DISABLE|CPSR_SUPERVISOR_MODE)
msr cpsr, r0
// invalidate I & D caches & BTB
mcr p15, 0, r0, c7, c7, 0
CPWAIT r0
// invalidate I & Data TLB
mcr p15, 0, r0, c8, c7, 0
CPWAIT r0
// drain write and fill buffers
mcr p15, 0, r0, c7, c10, 4
CPWAIT r0
// disable write buffer coalescing
mrc p15, 0, r0, c1, c0, 1
orr r0, r0, #1
mcr p15, 0, r0, c1, c0, 1
CPWAIT r0
// Setup chip selects
ldr r1, =IXP425_EXP_CFG_BASE
#ifdef IXP425_EXP_CS0_INIT
ldr r0, =IXP425_EXP_CS0_INIT
str r0, [r1, #IXP425_EXP_CS0]
#endif
#ifdef IXP425_EXP_CS1_INIT
ldr r0, =IXP425_EXP_CS1_INIT
str r0, [r1, #IXP425_EXP_CS1]
#endif
#ifdef IXP425_EXP_CS2_INIT
ldr r0, =IXP425_EXP_CS2_INIT
str r0, [r1, #IXP425_EXP_CS2]
#endif
#ifdef IXP425_EXP_CS3_INIT
ldr r0, =IXP425_EXP_CS3_INIT
str r0, [r1, #IXP425_EXP_CS3]
#endif
#ifdef IXP425_EXP_CS4_INIT
ldr r0, =IXP425_EXP_CS4_INIT
str r0, [r1, #IXP425_EXP_CS4]
#endif
#ifdef IXP425_EXP_CS5_INIT
ldr r0, =IXP425_EXP_CS5_INIT
str r0, [r1, #IXP425_EXP_CS5]
#endif
#ifdef IXP425_EXP_CS6_INIT
ldr r0, =IXP425_EXP_CS6_INIT
str r0, [r1, #IXP425_EXP_CS6]
#endif
#ifdef IXP425_EXP_CS7_INIT
ldr r0, =IXP425_EXP_CS7_INIT
str r0, [r1, #IXP425_EXP_CS7]
#endif
DISPLAY 0x1001, r7, r8
// Enable the Icache
mrc p15, 0, r0, c1, c0, 0
orr r0, r0, #MMU_Control_I
mcr p15, 0, r0, c1, c0, 0
CPWAIT r0
DISPLAY 0x1002, r7, r8
// Setup SDRAM controller
ldr r0, =IXP425_SDRAM_CFG_BASE
ldr r1, =IXP425_SDRAM_CONFIG_INIT
str r1, [r0, #IXP425_SDRAM_CONFIG]
// disable refresh cycles
mov r1, #0
str r1, [r0, #IXP425_SDRAM_REFRESH]
// send nop command
mov r1, #SDRAM_IR_NOP
str r1, [r0, #IXP425_SDRAM_IR]
DELAY 0x10000, r1
// set SDRAM internal refresh val
ldr r1, =IXP425_SDRAM_REFRESH_CNT
str r1, [r0, #IXP425_SDRAM_REFRESH]
DELAY 0x10000, r1
// send precharge-all command to close all open banks
mov r1, #SDRAM_IR_PRECHARGE
str r1, [r0, #IXP425_SDRAM_IR]
DELAY 0x10000, r1
// provide 8 auto-refresh cycles
mov r1, #SDRAM_IR_AUTO_REFRESH
mov r2, #8
1:
str r1, [r0, #IXP425_SDRAM_IR]
DELAY 0x800, r3
subs r2, r2, #1
bne 1b
// set mode register in sdram
mov r1, #IXP425_SDRAM_SET_MODE_CMD
str r1, [r0, #IXP425_SDRAM_IR]
DELAY 0x10000, r1
// start normal operation
mov r1, #SDRAM_IR_NORMAL
str r1, [r0, #IXP425_SDRAM_IR]
DELAY 0x10000, r1
DISPLAY 0x1003, r7, r8
// Enable byte swapping control via page table P bit.
ldr r2, =IXP425_EXP_CFG_BASE
ldr r1, [r2, #IXP425_EXP_CNFG1]
orr r1, r1, #EXP_CNFG1_BYTE_SWAP_EN
str r1, [r2, #IXP425_EXP_CNFG1]
// value to load into pc to jump to real runtime address
ldr r0, =1f
#if defined(CYG_HAL_STARTUP_ROMRAM)
// R0 holds a RAM address for ROMRAM startup,
// so convert to a flash address.
orr r0, r0, #IXDP_FLASH_BASE
#endif
// Setup EXP_CNFG0 value to switch EXP bus out of low memory
ldr r2, =IXP425_EXP_CFG_BASE
ldr r1, [r2, #IXP425_EXP_CNFG0]
bic r1, r1, #EXP_CNFG0_MEM_MAP
ldr r3, =0xFFFF
ldr r4, =IXDP425_LED_DATA
b icache_boundary
.p2align 5
icache_boundary:
// Here is where we switch from boot address (0x000000000) to the
// actual flash runtime address. We align to cache boundary so we
// execute from cache during the switchover. Cachelines are 8 words.
str r1, [r2, #IXP425_EXP_CNFG0] // make the EXP bus switch
nop
nop
nop
nop
mov pc, r0
strh r3, [r4] // We should never reach this point. If we do,
// display FFFF and loop forever.
0: b 0b
1:
DISPLAY 0x1004, r7, r8
#if defined(CYG_HAL_STARTUP_ROMRAM)
mov r0, #IXDP_FLASH_BASE
mov r1, #SDRAM_PHYS_BASE
ldr r2, =__ram_data_end
20: ldr r3, [r0],#4
str r3, [r1],#4
cmp r1, r2
bne 20b
// start executing from RAM
ldr r0, =30f
mov pc, r0
30:
#endif
// Build mmu tables into RAM so page table walks by the cpu
// don't interfere with FLASH programming.
mov r1, #SDRAM_PHYS_BASE
orr r1, r1, #0x4000 // RAM tables
add r2, r1, #0x4000 // End of tables
// First clear table
mov r0, #0
1:
str r0, [r1], #4
cmp r1, r2
bne 1b
// Build section mappings
IXP_MAP_SDRAM SDRAM_BASE, 1, 0, 0, 0 // Cached SDRAM
IXP_MAP_SDRAM SDRAM_ALIAS_BASE, 1, 0, 0, 0 // Cached SDRAM alias
IXP_MAP_SDRAM SDRAM_UNCACHED_BASE, 0, 0, 0, 0 // Uncached SDRAM
IXP_MAP_SDRAM SDRAM_DC_BASE, 1, 0, 0, 1 // Cached data coherent SDRAM
IXP_MAP_EXP 0, IXDP_FLASH_SIZE, 1, 0, 0, 0 // Flash
IXP_MAP_EXP 2, IXDP425_LED_SIZE, 0, 0, 0, 0 // LED
IXP_MAP_EXP 4, (1 << 20), 0, 0, 0, 0 // NPE use
IXP_MAP_EXP 5, (1 << 20), 0, 0, 0, 0 // NPE use
IXP_MAP_EXP_V 0, IXDP_FLASH_DC_BASE, IXDP_FLASH_SIZE, 1, 0, 0, 1 // data coherent flash
IXP_MAP_IO IXP425_PCI_WINDOW_BASE, IXP425_PCI_WINDOW_SIZE
IXP_MAP_IO IXP425_QMGR_BASE, IXP425_QMGR_SIZE
IXP_MAP_IO IXP425_PCI_CFG_BASE, IXP425_PCI_CFG_SIZE
IXP_MAP_IO IXP425_EXP_CFG_BASE, IXP425_EXP_CFG_SIZE
IXP_MAP_IO IXP425_MISC_CFG_BASE, IXP425_MISC_CFG_SIZE
IXP_MAP_IO IXP425_SDRAM_CFG_BASE, IXP425_SDRAM_CFG_SIZE
DISPLAY 0x1005, r7, r8
mcr p15, 0, r0, c7, c10, 4 // drain the write & fill buffers
CPWAIT r0
// Set the TTB register to DRAM mmu_table
ldr r0, =(SDRAM_PHYS_BASE | 0x4000) // RAM tables
mcr p15, 0, r0, c2, c0, 0 // load page table pointer
CPWAIT r0
// enable permission checks in all domains
ldr r0, =0x55555555
mcr p15, 0, r0, c3, c0, 0
CPWAIT r0
DISPLAY 0x1006, r7, r8
// enable mmu
mrc p15, 0, r0, c1, c0, 0
orr r0, r0, #MMU_Control_M
orr r0, r0, #MMU_Control_R
mcr p15, 0, r0, c1, c0, 0
CPWAIT r0
DISPLAY 0x1007, r7, r8
// enable D cache
mrc p15, 0, r0, c1, c0, 0
orr r0, r0, #MMU_Control_C
mcr p15, 0, r0, c1, c0, 0
CPWAIT r0
DISPLAY 0x1008, r7, r8
// Enable branch target buffer
mrc p15, 0, r0, c1, c0, 0
orr r0, r0, #MMU_Control_BTB
mcr p15, 0, r0, c1, c0, 0
CPWAIT r0
DISPLAY 0x1009, r7, r8
mcr p15, 0, r0, c7, c10, 4 // drain the write & fill buffers
CPWAIT r0
mcr p15, 0, r0, c7, c7, 0 // flush Icache, Dcache and BTB
CPWAIT r0
mcr p15, 0, r0, c8, c7, 0 // flush instuction and data TLBs
CPWAIT r0
mcr p15, 0, r0, c7, c10, 4 // drain the write & fill buffers
CPWAIT r0
DISPLAY 0x100A, r7, r8
// save SDRAM size
ldr r1, =hal_dram_size /* [see hal_intr.h] */
mov r8, #SDRAM_SIZE
str r8, [r1]
DISPLAY 0x100B, r7, r8
.endm // _platform_setup1
#else // defined(CYG_HAL_STARTUP_ROM)
#define PLATFORM_SETUP1
#endif
#define PLATFORM_VECTORS _platform_vectors
.macro _platform_vectors
.endm
/*---------------------------------------------------------------------------*/
/* end of hal_platform_setup.h */
#endif /* CYGONCE_HAL_PLATFORM_SETUP_H */
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