u-boot/arch/blackfin/cpu/cpu.c

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/*
* U-Boot - cpu.c CPU specific functions
*
* Copyright (c) 2005-2008 Analog Devices Inc.
*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Licensed under the GPL-2 or later.
*/
#include <common.h>
#include <command.h>
#include <serial.h>
#include <version.h>
#include <i2c.h>
#include <asm/blackfin.h>
#include <asm/cplb.h>
#include <asm/clock.h>
#include <asm/mach-common/bits/core.h>
#include <asm/mach-common/bits/ebiu.h>
#include <asm/mach-common/bits/trace.h>
#include "cpu.h"
#include "initcode.h"
#include "exports.h"
ulong bfin_poweron_retx;
DECLARE_GLOBAL_DATA_PTR;
#if defined(CONFIG_CORE1_RUN) && defined(COREB_L1_CODE_START)
void bfin_core1_start(void)
{
#ifdef BF561_FAMILY
/* Enable core 1 */
bfin_write_SYSCR(bfin_read_SYSCR() & ~0x0020);
#else
/* Enable core 1 */
bfin_write32(RCU0_SVECT1, COREB_L1_CODE_START);
bfin_write32(RCU0_CRCTL, 0);
bfin_write32(RCU0_CRCTL, 0x2);
/* Check if core 1 starts */
while (!(bfin_read32(RCU0_CRSTAT) & 0x2))
continue;
bfin_write32(RCU0_CRCTL, 0);
/* flag to notify cces core 1 application */
bfin_write32(SDU0_MSG_SET, (1 << 19));
#endif
}
#endif
__attribute__((always_inline))
static inline void serial_early_puts(const char *s)
{
#ifdef CONFIG_DEBUG_EARLY_SERIAL
serial_puts("Early: ");
serial_puts(s);
#endif
}
static int global_board_data_init(void)
{
#ifndef CONFIG_SYS_GBL_DATA_ADDR
# define CONFIG_SYS_GBL_DATA_ADDR 0
#endif
#ifndef CONFIG_SYS_BD_INFO_ADDR
# define CONFIG_SYS_BD_INFO_ADDR 0
#endif
bd_t *bd;
if (CONFIG_SYS_GBL_DATA_ADDR) {
gd = (gd_t *)(CONFIG_SYS_GBL_DATA_ADDR);
memset((void *)gd, 0, GENERATED_GBL_DATA_SIZE);
} else {
static gd_t _bfin_gd;
gd = &_bfin_gd;
}
if (CONFIG_SYS_BD_INFO_ADDR) {
bd = (bd_t *)(CONFIG_SYS_BD_INFO_ADDR);
memset(bd, 0, GENERATED_BD_INFO_SIZE);
} else {
static bd_t _bfin_bd;
bd = &_bfin_bd;
}
gd->bd = bd;
bd->bi_r_version = version_string;
bd->bi_cpu = __stringify(CONFIG_BFIN_CPU);
bd->bi_board_name = CONFIG_SYS_BOARD;
bd->bi_vco = get_vco();
bd->bi_cclk = get_cclk();
bd->bi_sclk = get_sclk();
bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
bd->bi_memsize = CONFIG_SYS_MAX_RAM_SIZE;
gd->ram_size = CONFIG_SYS_MAX_RAM_SIZE;
return 0;
}
static void display_global_data(void)
{
bd_t *bd;
#ifndef CONFIG_DEBUG_EARLY_SERIAL
return;
#endif
bd = gd->bd;
printf(" gd: %p\n", gd);
printf(" |-flags: %lx\n", gd->flags);
printf(" |-board_type: %lx\n", gd->arch.board_type);
printf(" |-baudrate: %u\n", gd->baudrate);
printf(" |-have_console: %lx\n", gd->have_console);
printf(" |-ram_size: %lx\n", gd->ram_size);
printf(" |-env_addr: %lx\n", gd->env_addr);
printf(" |-env_valid: %lx\n", gd->env_valid);
printf(" |-jt(%p): %p\n", gd->jt, gd->jt->get_version);
printf(" \\-bd: %p\n", gd->bd);
printf(" |-bi_boot_params: %lx\n", bd->bi_boot_params);
printf(" |-bi_memstart: %lx\n", bd->bi_memstart);
printf(" |-bi_memsize: %lx\n", bd->bi_memsize);
printf(" |-bi_flashstart: %lx\n", bd->bi_flashstart);
printf(" |-bi_flashsize: %lx\n", bd->bi_flashsize);
printf(" \\-bi_flashoffset: %lx\n", bd->bi_flashoffset);
}
#define CPLB_PAGE_SIZE (4 * 1024 * 1024)
#define CPLB_PAGE_MASK (~(CPLB_PAGE_SIZE - 1))
#if defined(__ADSPBF60x__)
#define CPLB_EX_PAGE_SIZE (16 * 1024 * 1024)
#define CPLB_EX_PAGE_MASK (~(CPLB_EX_PAGE_SIZE - 1))
#else
#define CPLB_EX_PAGE_SIZE CPLB_PAGE_SIZE
#define CPLB_EX_PAGE_MASK CPLB_PAGE_MASK
#endif
void init_cplbtables(void)
{
uint32_t *ICPLB_ADDR, *ICPLB_DATA;
uint32_t *DCPLB_ADDR, *DCPLB_DATA;
uint32_t extern_memory;
size_t i;
void icplb_add(uint32_t addr, uint32_t data)
{
bfin_write32(ICPLB_ADDR + i, addr);
bfin_write32(ICPLB_DATA + i, data);
}
void dcplb_add(uint32_t addr, uint32_t data)
{
bfin_write32(DCPLB_ADDR + i, addr);
bfin_write32(DCPLB_DATA + i, data);
}
/* populate a few common entries ... we'll let
* the memory map and cplb exception handler do
* the rest of the work.
*/
i = 0;
ICPLB_ADDR = (uint32_t *)ICPLB_ADDR0;
ICPLB_DATA = (uint32_t *)ICPLB_DATA0;
DCPLB_ADDR = (uint32_t *)DCPLB_ADDR0;
DCPLB_DATA = (uint32_t *)DCPLB_DATA0;
icplb_add(0xFFA00000, L1_IMEMORY);
dcplb_add(0xFF800000, L1_DMEMORY);
++i;
#if defined(__ADSPBF60x__)
icplb_add(0x0, 0x0);
dcplb_add(CONFIG_SYS_FLASH_BASE, PAGE_SIZE_16MB | CPLB_DIRTY |
CPLB_SUPV_WR | CPLB_USER_WR | CPLB_USER_RD | CPLB_VALID);
++i;
#endif
if (CONFIG_MEM_SIZE) {
uint32_t mbase = CONFIG_SYS_MONITOR_BASE;
uint32_t mend = mbase + CONFIG_SYS_MONITOR_LEN - 1;
mbase &= CPLB_PAGE_MASK;
mend &= CPLB_PAGE_MASK;
icplb_add(mbase, SDRAM_IKERNEL);
dcplb_add(mbase, SDRAM_DKERNEL);
++i;
/*
* If the monitor crosses a 4 meg boundary, we'll need
* to lock two entries for it. We assume it doesn't
* cross two 4 meg boundaries ...
*/
if (mbase != mend) {
icplb_add(mend, SDRAM_IKERNEL);
dcplb_add(mend, SDRAM_DKERNEL);
++i;
}
}
#ifndef __ADSPBF60x__
icplb_add(0x20000000, SDRAM_INON_CHBL);
dcplb_add(0x20000000, SDRAM_EBIU);
++i;
#endif
/* Add entries for the rest of external RAM up to the bootrom */
extern_memory = 0;
#ifdef CONFIG_DEBUG_NULL_PTR
icplb_add(extern_memory,
(SDRAM_IKERNEL & ~PAGE_SIZE_MASK) | PAGE_SIZE_1KB);
dcplb_add(extern_memory,
(SDRAM_DKERNEL & ~PAGE_SIZE_MASK) | PAGE_SIZE_1KB);
++i;
icplb_add(extern_memory, SDRAM_IKERNEL);
dcplb_add(extern_memory, SDRAM_DKERNEL);
extern_memory += CPLB_PAGE_SIZE;
++i;
#endif
while (i < 16 && extern_memory <
(CONFIG_SYS_MONITOR_BASE & CPLB_EX_PAGE_MASK)) {
icplb_add(extern_memory, SDRAM_IGENERIC);
dcplb_add(extern_memory, SDRAM_DGENERIC);
extern_memory += CPLB_EX_PAGE_SIZE;
++i;
}
while (i < 16) {
icplb_add(0, 0);
dcplb_add(0, 0);
++i;
}
}
int print_cpuinfo(void)
{
char buf[32];
printf("CPU: ADSP %s (Detected Rev: 0.%d) (%s boot)\n",
gd->bd->bi_cpu,
bfin_revid(),
get_bfin_boot_mode(CONFIG_BFIN_BOOT_MODE));
printf("Clock: VCO: %s MHz, ", strmhz(buf, get_vco()));
printf("Core: %s MHz, ", strmhz(buf, get_cclk()));
#if defined(__ADSPBF60x__)
printf("System0: %s MHz, ", strmhz(buf, get_sclk0()));
printf("System1: %s MHz, ", strmhz(buf, get_sclk1()));
printf("Dclk: %s MHz\n", strmhz(buf, get_dclk()));
#else
printf("System: %s MHz\n", strmhz(buf, get_sclk()));
#endif
return 0;
}
int exception_init(void)
{
bfin_write_EVT3(trap);
return 0;
}
int irq_init(void)
{
#ifdef SIC_IMASK0
bfin_write_SIC_IMASK0(0);
bfin_write_SIC_IMASK1(0);
# ifdef SIC_IMASK2
bfin_write_SIC_IMASK2(0);
# endif
#elif defined(SICA_IMASK0)
bfin_write_SICA_IMASK0(0);
bfin_write_SICA_IMASK1(0);
#elif defined(SIC_IMASK)
bfin_write_SIC_IMASK(0);
#endif
/* Set up a dummy NMI handler if needed. */
if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_BYPASS || ANOMALY_05000219)
bfin_write_EVT2(evt_nmi); /* NMI */
bfin_write_EVT5(evt_default); /* hardware error */
bfin_write_EVT6(evt_default); /* core timer */
bfin_write_EVT7(evt_default);
bfin_write_EVT8(evt_default);
bfin_write_EVT9(evt_default);
bfin_write_EVT10(evt_default);
bfin_write_EVT11(evt_default);
bfin_write_EVT12(evt_default);
bfin_write_EVT13(evt_default);
bfin_write_EVT14(evt_default);
bfin_write_EVT15(evt_default);
bfin_write_ILAT(0);
CSYNC();
/* enable hardware error irq */
irq_flags = 0x3f;
local_irq_enable();
return 0;
}
__attribute__ ((__noreturn__))
void cpu_init_f(ulong bootflag, ulong loaded_from_ldr)
{
#ifndef CONFIG_BFIN_BOOTROM_USES_EVT1
/* Build a NOP slide over the LDR jump block. Whee! */
char nops[0xC];
serial_early_puts("NOP Slide\n");
memset(nops, 0x00, sizeof(nops));
memcpy((void *)L1_INST_SRAM, nops, sizeof(nops));
#endif
if (!loaded_from_ldr) {
/* Relocate sections into L1 if the LDR didn't do it -- don't
* check length because the linker script does the size
* checking at build time.
*/
serial_early_puts("L1 Relocate\n");
extern char _stext_l1[], _text_l1_lma[], _text_l1_len[];
memcpy(&_stext_l1, &_text_l1_lma, (unsigned long)_text_l1_len);
extern char _sdata_l1[], _data_l1_lma[], _data_l1_len[];
memcpy(&_sdata_l1, &_data_l1_lma, (unsigned long)_data_l1_len);
}
/*
* Make sure our async settings are committed. Some bootroms
* (like the BF537) will reset some registers on us after it
* has finished loading the LDR. Or if we're booting over
* JTAG, the initcode never got a chance to run. Or if we
* aren't booting from parallel flash, the initcode skipped
* this step completely.
*/
program_async_controller(NULL);
/* Save RETX so we can pass it while booting Linux */
bfin_poweron_retx = bootflag;
#ifdef CONFIG_DEBUG_DUMP
/* Turn on hardware trace buffer */
bfin_write_TBUFCTL(TBUFPWR | TBUFEN);
#endif
#ifndef CONFIG_PANIC_HANG
/* Reset upon a double exception rather than just hanging.
* Do not do bfin_read on SWRST as that will reset status bits.
*/
# ifdef SWRST
bfin_write_SWRST(DOUBLE_FAULT);
# endif
#endif
#if defined(CONFIG_CORE1_RUN) && defined(COREB_L1_CODE_START)
bfin_core1_start();
#endif
serial_early_puts("Init global data\n");
global_board_data_init();
board_init_f(0);
/* should not be reached */
while (1);
}
int arch_cpu_init(void)
{
serial_early_puts("Init CPLB tables\n");
init_cplbtables();
serial_early_puts("Exceptions setup\n");
exception_init();
#ifndef CONFIG_ICACHE_OFF
serial_early_puts("Turn on ICACHE\n");
icache_enable();
#endif
#ifndef CONFIG_DCACHE_OFF
serial_early_puts("Turn on DCACHE\n");
dcache_enable();
#endif
#ifdef DEBUG
if (GENERATED_GBL_DATA_SIZE < sizeof(*gd))
hang();
#endif
/* Initialize */
serial_early_puts("IRQ init\n");
irq_init();
return 0;
}
int arch_misc_init(void)
{
#if defined(CONFIG_SYS_I2C)
i2c_reloc_fixup();
#endif
display_global_data();
if (CONFIG_MEM_SIZE && bfin_os_log_check()) {
puts("\nLog buffer from operating system:\n");
bfin_os_log_dump();
puts("\n");
}
return 0;
}
int interrupt_init(void)
{
return 0;
}