722 lines
19 KiB
C
722 lines
19 KiB
C
/*
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* initcode.c - Initialize the processor. This is usually entails things
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* like external memory, voltage regulators, etc... Note that this file
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* cannot make any function calls as it may be executed all by itself by
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* the Blackfin's bootrom in LDR format.
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*
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* Copyright (c) 2004-2008 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#define BFIN_IN_INITCODE
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#include <config.h>
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#include <asm/blackfin.h>
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#include <asm/mach-common/bits/bootrom.h>
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#include <asm/mach-common/bits/core.h>
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#include <asm/mach-common/bits/ebiu.h>
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#include <asm/mach-common/bits/pll.h>
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#include <asm/mach-common/bits/uart.h>
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#include "serial.h"
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__attribute__((always_inline))
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static inline void serial_init(void)
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{
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#ifdef __ADSPBF54x__
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# ifdef BFIN_BOOT_UART_USE_RTS
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# define BFIN_UART_USE_RTS 1
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# else
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# define BFIN_UART_USE_RTS 0
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# endif
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if (BFIN_UART_USE_RTS && CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) {
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size_t i;
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/* force RTS rather than relying on auto RTS */
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bfin_write16(&pUART->mcr, bfin_read16(&pUART->mcr) | FCPOL);
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/* Wait for the line to clear up. We cannot rely on UART
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* registers as none of them reflect the status of the RSR.
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* Instead, we'll sleep for ~10 bit times at 9600 baud.
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* We can precalc things here by assuming boot values for
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* PLL rather than loading registers and calculating.
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* baud = SCLK / (16 ^ (1 - EDBO) * Divisor)
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* EDB0 = 0
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* Divisor = (SCLK / baud) / 16
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* SCLK = baud * 16 * Divisor
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* SCLK = (0x14 * CONFIG_CLKIN_HZ) / 5
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* CCLK = (16 * Divisor * 5) * (9600 / 10)
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* In reality, this will probably be just about 1 second delay,
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* so assuming 9600 baud is OK (both as a very low and too high
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* speed as this will buffer things enough).
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*/
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#define _NUMBITS (10) /* how many bits to delay */
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#define _LOWBAUD (9600) /* low baud rate */
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#define _SCLK ((0x14 * CONFIG_CLKIN_HZ) / 5) /* SCLK based on PLL */
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#define _DIVISOR ((_SCLK / _LOWBAUD) / 16) /* UART DLL/DLH */
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#define _NUMINS (3) /* how many instructions in loop */
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#define _CCLK (((16 * _DIVISOR * 5) * (_LOWBAUD / _NUMBITS)) / _NUMINS)
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i = _CCLK;
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while (i--)
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asm volatile("" : : : "memory");
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}
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#endif
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if (BFIN_DEBUG_EARLY_SERIAL) {
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int ucen = bfin_read16(&pUART->gctl) & UCEN;
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serial_early_init();
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/* If the UART is off, that means we need to program
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* the baud rate ourselves initially.
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*/
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if (ucen != UCEN)
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serial_early_set_baud(CONFIG_BAUDRATE);
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}
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}
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__attribute__((always_inline))
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static inline void serial_deinit(void)
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{
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#ifdef __ADSPBF54x__
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if (BFIN_UART_USE_RTS && CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) {
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/* clear forced RTS rather than relying on auto RTS */
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bfin_write16(&pUART->mcr, bfin_read16(&pUART->mcr) & ~FCPOL);
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}
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#endif
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}
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__attribute__((always_inline))
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static inline void serial_putc(char c)
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{
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if (!BFIN_DEBUG_EARLY_SERIAL)
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return;
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if (c == '\n')
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serial_putc('\r');
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bfin_write16(&pUART->thr, c);
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while (!(bfin_read16(&pUART->lsr) & TEMT))
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continue;
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}
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__attribute__((always_inline)) static inline void
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program_nmi_handler(void)
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{
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u32 tmp1, tmp2;
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/* Older bootroms don't create a dummy NMI handler,
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* so make one ourselves ASAP in case it fires.
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*/
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if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS && !ANOMALY_05000219)
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return;
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asm volatile (
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"%0 = RETS;" /* Save current RETS */
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"CALL 1f;" /* Figure out current PC */
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"RTN;" /* The simple NMI handler */
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"1:"
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"%1 = RETS;" /* Load addr of NMI handler */
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"RETS = %0;" /* Restore RETS */
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"[%2] = %1;" /* Write NMI handler */
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: "=r"(tmp1), "=r"(tmp2) : "ab"(EVT2)
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);
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}
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/* Max SCLK can be 133MHz ... dividing that by (2*4) gives
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* us a freq of 16MHz for SPI which should generally be
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* slow enough for the slow reads the bootrom uses.
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*/
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#if !defined(CONFIG_SPI_FLASH_SLOW_READ) && \
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((defined(__ADSPBF52x__) && __SILICON_REVISION__ >= 2) || \
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(defined(__ADSPBF54x__) && __SILICON_REVISION__ >= 1))
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# define BOOTROM_SUPPORTS_SPI_FAST_READ 1
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#else
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# define BOOTROM_SUPPORTS_SPI_FAST_READ 0
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#endif
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#ifndef CONFIG_SPI_BAUD_INITBLOCK
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# define CONFIG_SPI_BAUD_INITBLOCK (BOOTROM_SUPPORTS_SPI_FAST_READ ? 2 : 4)
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#endif
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#ifdef SPI0_BAUD
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# define bfin_write_SPI_BAUD bfin_write_SPI0_BAUD
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#endif
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/* PLL_DIV defines */
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#ifndef CONFIG_PLL_DIV_VAL
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# if (CONFIG_CCLK_DIV == 1)
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# define CONFIG_CCLK_ACT_DIV CCLK_DIV1
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# elif (CONFIG_CCLK_DIV == 2)
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# define CONFIG_CCLK_ACT_DIV CCLK_DIV2
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# elif (CONFIG_CCLK_DIV == 4)
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# define CONFIG_CCLK_ACT_DIV CCLK_DIV4
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# elif (CONFIG_CCLK_DIV == 8)
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# define CONFIG_CCLK_ACT_DIV CCLK_DIV8
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# else
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# define CONFIG_CCLK_ACT_DIV CONFIG_CCLK_DIV_not_defined_properly
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# endif
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# define CONFIG_PLL_DIV_VAL (CONFIG_CCLK_ACT_DIV | CONFIG_SCLK_DIV)
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#endif
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#ifndef CONFIG_PLL_LOCKCNT_VAL
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# define CONFIG_PLL_LOCKCNT_VAL 0x0300
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#endif
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#ifndef CONFIG_PLL_CTL_VAL
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# define CONFIG_PLL_CTL_VAL (SPORT_HYST | (CONFIG_VCO_MULT << 9) | CONFIG_CLKIN_HALF)
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#endif
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#ifndef CONFIG_EBIU_RSTCTL_VAL
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# define CONFIG_EBIU_RSTCTL_VAL 0 /* only MDDRENABLE is useful */
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#endif
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#if ((CONFIG_EBIU_RSTCTL_VAL & 0xFFFFFFC4) != 0)
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# error invalid EBIU_RSTCTL value: must not set reserved bits
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#endif
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#ifndef CONFIG_EBIU_MBSCTL_VAL
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# define CONFIG_EBIU_MBSCTL_VAL 0
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#endif
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#if defined(CONFIG_EBIU_DDRQUE_VAL) && ((CONFIG_EBIU_DDRQUE_VAL & 0xFFFF8000) != 0)
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# error invalid EBIU_DDRQUE value: must not set reserved bits
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#endif
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/* Make sure our voltage value is sane so we don't blow up! */
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#ifndef CONFIG_VR_CTL_VAL
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# define BFIN_CCLK ((CONFIG_CLKIN_HZ * CONFIG_VCO_MULT) / CONFIG_CCLK_DIV)
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# if defined(__ADSPBF533__) || defined(__ADSPBF532__) || defined(__ADSPBF531__)
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# define CCLK_VLEV_120 400000000
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# define CCLK_VLEV_125 533000000
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# elif defined(__ADSPBF537__) || defined(__ADSPBF536__) || defined(__ADSPBF534__)
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# define CCLK_VLEV_120 401000000
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# define CCLK_VLEV_125 401000000
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# elif defined(__ADSPBF561__)
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# define CCLK_VLEV_120 300000000
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# define CCLK_VLEV_125 501000000
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# endif
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# if BFIN_CCLK < CCLK_VLEV_120
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# define CONFIG_VR_CTL_VLEV VLEV_120
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# elif BFIN_CCLK < CCLK_VLEV_125
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# define CONFIG_VR_CTL_VLEV VLEV_125
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# else
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# define CONFIG_VR_CTL_VLEV VLEV_130
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# endif
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# if defined(__ADSPBF52x__) /* TBD; use default */
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# undef CONFIG_VR_CTL_VLEV
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# define CONFIG_VR_CTL_VLEV VLEV_110
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# elif defined(__ADSPBF54x__) /* TBD; use default */
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# undef CONFIG_VR_CTL_VLEV
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# define CONFIG_VR_CTL_VLEV VLEV_120
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# elif defined(__ADSPBF538__) || defined(__ADSPBF539__) /* TBD; use default */
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# undef CONFIG_VR_CTL_VLEV
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# define CONFIG_VR_CTL_VLEV VLEV_125
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# endif
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# ifdef CONFIG_BFIN_MAC
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# define CONFIG_VR_CTL_CLKBUF CLKBUFOE
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# else
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# define CONFIG_VR_CTL_CLKBUF 0
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# endif
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# if defined(__ADSPBF52x__)
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# define CONFIG_VR_CTL_FREQ FREQ_1000
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# else
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# define CONFIG_VR_CTL_FREQ (GAIN_20 | FREQ_1000)
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# endif
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# define CONFIG_VR_CTL_VAL (CONFIG_VR_CTL_CLKBUF | CONFIG_VR_CTL_VLEV | CONFIG_VR_CTL_FREQ)
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#endif
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/* some parts do not have an on-chip voltage regulator */
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#if defined(__ADSPBF51x__)
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# define CONFIG_HAS_VR 0
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# undef CONFIG_VR_CTL_VAL
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# define CONFIG_VR_CTL_VAL 0
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#else
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# define CONFIG_HAS_VR 1
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#endif
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#if CONFIG_MEM_SIZE
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#ifndef EBIU_RSTCTL
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/* Blackfin with SDRAM */
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#ifndef CONFIG_EBIU_SDBCTL_VAL
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# if CONFIG_MEM_SIZE == 16
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# define CONFIG_EBSZ_VAL EBSZ_16
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# elif CONFIG_MEM_SIZE == 32
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# define CONFIG_EBSZ_VAL EBSZ_32
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# elif CONFIG_MEM_SIZE == 64
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# define CONFIG_EBSZ_VAL EBSZ_64
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# elif CONFIG_MEM_SIZE == 128
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# define CONFIG_EBSZ_VAL EBSZ_128
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# elif CONFIG_MEM_SIZE == 256
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# define CONFIG_EBSZ_VAL EBSZ_256
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# elif CONFIG_MEM_SIZE == 512
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# define CONFIG_EBSZ_VAL EBSZ_512
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# else
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# error You need to define CONFIG_EBIU_SDBCTL_VAL or CONFIG_MEM_SIZE
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# endif
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# if CONFIG_MEM_ADD_WDTH == 8
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# define CONFIG_EBCAW_VAL EBCAW_8
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# elif CONFIG_MEM_ADD_WDTH == 9
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# define CONFIG_EBCAW_VAL EBCAW_9
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# elif CONFIG_MEM_ADD_WDTH == 10
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# define CONFIG_EBCAW_VAL EBCAW_10
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# elif CONFIG_MEM_ADD_WDTH == 11
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# define CONFIG_EBCAW_VAL EBCAW_11
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# else
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# error You need to define CONFIG_EBIU_SDBCTL_VAL or CONFIG_MEM_ADD_WDTH
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# endif
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# define CONFIG_EBIU_SDBCTL_VAL (CONFIG_EBCAW_VAL | CONFIG_EBSZ_VAL | EBE)
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#endif
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#endif
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#endif
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/* Conflicting Column Address Widths Causes SDRAM Errors:
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* EB2CAW and EB3CAW must be the same
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*/
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#if ANOMALY_05000362
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# if ((CONFIG_EBIU_SDBCTL_VAL & 0x30000000) >> 8) != (CONFIG_EBIU_SDBCTL_VAL & 0x00300000)
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# error "Anomaly 05000362: EB2CAW and EB3CAW must be the same"
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# endif
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#endif
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__attribute__((always_inline)) static inline void
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program_early_devices(ADI_BOOT_DATA *bs, uint *sdivB, uint *divB, uint *vcoB)
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{
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serial_putc('a');
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/* Save the clock pieces that are used in baud rate calculation */
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if (BFIN_DEBUG_EARLY_SERIAL || CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) {
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serial_putc('b');
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*sdivB = bfin_read_PLL_DIV() & 0xf;
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*vcoB = (bfin_read_PLL_CTL() >> 9) & 0x3f;
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*divB = serial_early_get_div();
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serial_putc('c');
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}
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serial_putc('d');
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#ifdef CONFIG_HW_WATCHDOG
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# ifndef CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE
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# define CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE 20000
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# endif
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/* Program the watchdog with an initial timeout of ~20 seconds.
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* Hopefully that should be long enough to load the u-boot LDR
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* (from wherever) and then the common u-boot code can take over.
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* In bypass mode, the start.S would have already set a much lower
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* timeout, so don't clobber that.
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*/
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if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS) {
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serial_putc('e');
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bfin_write_WDOG_CNT(MSEC_TO_SCLK(CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE));
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bfin_write_WDOG_CTL(0);
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serial_putc('f');
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}
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#endif
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serial_putc('g');
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/* Blackfin bootroms use the SPI slow read opcode instead of the SPI
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* fast read, so we need to slow down the SPI clock a lot more during
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* boot. Once we switch over to u-boot's SPI flash driver, we'll
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* increase the speed appropriately.
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*/
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if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_SPI_MASTER) {
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serial_putc('h');
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if (BOOTROM_SUPPORTS_SPI_FAST_READ && CONFIG_SPI_BAUD_INITBLOCK < 4)
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bs->dFlags |= BFLAG_FASTREAD;
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bfin_write_SPI_BAUD(CONFIG_SPI_BAUD_INITBLOCK);
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serial_putc('i');
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}
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serial_putc('j');
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}
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__attribute__((always_inline)) static inline bool
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maybe_self_refresh(ADI_BOOT_DATA *bs)
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{
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serial_putc('a');
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if (!CONFIG_MEM_SIZE)
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return false;
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/* If external memory is enabled, put it into self refresh first. */
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#ifdef EBIU_RSTCTL
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if (bfin_read_EBIU_RSTCTL() & DDR_SRESET) {
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serial_putc('b');
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bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() | SRREQ);
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return true;
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}
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#else
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if (bfin_read_EBIU_SDBCTL() & EBE) {
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serial_putc('b');
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bfin_write_EBIU_SDGCTL(bfin_read_EBIU_SDGCTL() | SRFS);
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return true;
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}
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#endif
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serial_putc('c');
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return false;
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}
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__attribute__((always_inline)) static inline u16
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program_clocks(ADI_BOOT_DATA *bs, bool put_into_srfs)
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{
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u16 vr_ctl;
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serial_putc('a');
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vr_ctl = bfin_read_VR_CTL();
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serial_putc('b');
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/* If we're entering self refresh, make sure it has happened. */
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if (put_into_srfs)
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#ifdef EBIU_RSTCTL
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while (!(bfin_read_EBIU_RSTCTL() & SRACK))
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#else
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while (!(bfin_read_EBIU_SDSTAT() & SDSRA))
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#endif
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continue;
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serial_putc('c');
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/* With newer bootroms, we use the helper function to set up
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* the memory controller. Older bootroms lacks such helpers
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* so we do it ourselves.
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*/
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if (!ANOMALY_05000386) {
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serial_putc('d');
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/* Always programming PLL_LOCKCNT avoids Anomaly 05000430 */
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ADI_SYSCTRL_VALUES memory_settings;
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uint32_t actions = SYSCTRL_WRITE | SYSCTRL_PLLCTL | SYSCTRL_LOCKCNT;
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if (!ANOMALY_05000440)
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actions |= SYSCTRL_PLLDIV;
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if (CONFIG_HAS_VR) {
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actions |= SYSCTRL_VRCTL;
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if (CONFIG_VR_CTL_VAL & FREQ_MASK)
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actions |= SYSCTRL_INTVOLTAGE;
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else
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actions |= SYSCTRL_EXTVOLTAGE;
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memory_settings.uwVrCtl = CONFIG_VR_CTL_VAL;
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} else
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actions |= SYSCTRL_EXTVOLTAGE;
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memory_settings.uwPllCtl = CONFIG_PLL_CTL_VAL;
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memory_settings.uwPllDiv = CONFIG_PLL_DIV_VAL;
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memory_settings.uwPllLockCnt = CONFIG_PLL_LOCKCNT_VAL;
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#if ANOMALY_05000432
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bfin_write_SIC_IWR1(0);
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#endif
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serial_putc('e');
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bfrom_SysControl(actions, &memory_settings, NULL);
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serial_putc('f');
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if (ANOMALY_05000440)
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bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL);
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#if ANOMALY_05000432
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bfin_write_SIC_IWR1(-1);
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#endif
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#if ANOMALY_05000171
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bfin_write_SICA_IWR0(-1);
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bfin_write_SICA_IWR1(-1);
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#endif
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serial_putc('g');
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} else {
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serial_putc('h');
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/* Disable all peripheral wakeups except for the PLL event. */
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#ifdef SIC_IWR0
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bfin_write_SIC_IWR0(1);
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bfin_write_SIC_IWR1(0);
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# ifdef SIC_IWR2
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bfin_write_SIC_IWR2(0);
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# endif
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#elif defined(SICA_IWR0)
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bfin_write_SICA_IWR0(1);
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bfin_write_SICA_IWR1(0);
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#else
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bfin_write_SIC_IWR(1);
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#endif
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serial_putc('i');
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/* Always programming PLL_LOCKCNT avoids Anomaly 05000430 */
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bfin_write_PLL_LOCKCNT(CONFIG_PLL_LOCKCNT_VAL);
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serial_putc('j');
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/* Only reprogram when needed to avoid triggering unnecessary
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* PLL relock sequences.
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*/
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if (vr_ctl != CONFIG_VR_CTL_VAL) {
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serial_putc('?');
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bfin_write_VR_CTL(CONFIG_VR_CTL_VAL);
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asm("idle;");
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serial_putc('!');
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}
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serial_putc('k');
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bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL);
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serial_putc('l');
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/* Only reprogram when needed to avoid triggering unnecessary
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* PLL relock sequences.
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*/
|
|
if (ANOMALY_05000242 || bfin_read_PLL_CTL() != CONFIG_PLL_CTL_VAL) {
|
|
serial_putc('?');
|
|
bfin_write_PLL_CTL(CONFIG_PLL_CTL_VAL);
|
|
asm("idle;");
|
|
serial_putc('!');
|
|
}
|
|
|
|
serial_putc('m');
|
|
|
|
/* Restore all peripheral wakeups. */
|
|
#ifdef SIC_IWR0
|
|
bfin_write_SIC_IWR0(-1);
|
|
bfin_write_SIC_IWR1(-1);
|
|
# ifdef SIC_IWR2
|
|
bfin_write_SIC_IWR2(-1);
|
|
# endif
|
|
#elif defined(SICA_IWR0)
|
|
bfin_write_SICA_IWR0(-1);
|
|
bfin_write_SICA_IWR1(-1);
|
|
#else
|
|
bfin_write_SIC_IWR(-1);
|
|
#endif
|
|
|
|
serial_putc('n');
|
|
}
|
|
|
|
serial_putc('o');
|
|
|
|
return vr_ctl;
|
|
}
|
|
|
|
__attribute__((always_inline)) static inline void
|
|
update_serial_clocks(ADI_BOOT_DATA *bs, uint sdivB, uint divB, uint vcoB)
|
|
{
|
|
serial_putc('a');
|
|
|
|
/* Since we've changed the SCLK above, we may need to update
|
|
* the UART divisors (UART baud rates are based on SCLK).
|
|
* Do the division by hand as there are no native instructions
|
|
* for dividing which means we'd generate a libgcc reference.
|
|
*/
|
|
if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) {
|
|
serial_putc('b');
|
|
unsigned int sdivR, vcoR;
|
|
sdivR = bfin_read_PLL_DIV() & 0xf;
|
|
vcoR = (bfin_read_PLL_CTL() >> 9) & 0x3f;
|
|
int dividend = sdivB * divB * vcoR;
|
|
int divisor = vcoB * sdivR;
|
|
unsigned int quotient;
|
|
for (quotient = 0; dividend > 0; ++quotient)
|
|
dividend -= divisor;
|
|
serial_early_put_div(quotient - ANOMALY_05000230);
|
|
serial_putc('c');
|
|
}
|
|
|
|
serial_putc('d');
|
|
}
|
|
|
|
__attribute__((always_inline)) static inline void
|
|
program_memory_controller(ADI_BOOT_DATA *bs, bool put_into_srfs)
|
|
{
|
|
serial_putc('a');
|
|
|
|
if (!CONFIG_MEM_SIZE)
|
|
return;
|
|
|
|
serial_putc('b');
|
|
|
|
/* Program the external memory controller before we come out of
|
|
* self-refresh. This only works with our SDRAM controller.
|
|
*/
|
|
#ifndef EBIU_RSTCTL
|
|
# ifdef CONFIG_EBIU_SDRRC_VAL
|
|
bfin_write_EBIU_SDRRC(CONFIG_EBIU_SDRRC_VAL);
|
|
# endif
|
|
# ifdef CONFIG_EBIU_SDBCTL_VAL
|
|
bfin_write_EBIU_SDBCTL(CONFIG_EBIU_SDBCTL_VAL);
|
|
# endif
|
|
# ifdef CONFIG_EBIU_SDGCTL_VAL
|
|
bfin_write_EBIU_SDGCTL(CONFIG_EBIU_SDGCTL_VAL);
|
|
# endif
|
|
#endif
|
|
|
|
serial_putc('c');
|
|
|
|
/* Now that we've reprogrammed, take things out of self refresh. */
|
|
if (put_into_srfs)
|
|
#ifdef EBIU_RSTCTL
|
|
bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() & ~(SRREQ));
|
|
#else
|
|
bfin_write_EBIU_SDGCTL(bfin_read_EBIU_SDGCTL() & ~(SRFS));
|
|
#endif
|
|
|
|
serial_putc('d');
|
|
|
|
/* Our DDR controller sucks and cannot be programmed while in
|
|
* self-refresh. So we have to pull it out before programming.
|
|
*/
|
|
#ifdef EBIU_RSTCTL
|
|
# ifdef CONFIG_EBIU_RSTCTL_VAL
|
|
bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() | 0x1 /*DDRSRESET*/ | CONFIG_EBIU_RSTCTL_VAL);
|
|
# endif
|
|
# ifdef CONFIG_EBIU_DDRCTL0_VAL
|
|
bfin_write_EBIU_DDRCTL0(CONFIG_EBIU_DDRCTL0_VAL);
|
|
# endif
|
|
# ifdef CONFIG_EBIU_DDRCTL1_VAL
|
|
bfin_write_EBIU_DDRCTL1(CONFIG_EBIU_DDRCTL1_VAL);
|
|
# endif
|
|
# ifdef CONFIG_EBIU_DDRCTL2_VAL
|
|
bfin_write_EBIU_DDRCTL2(CONFIG_EBIU_DDRCTL2_VAL);
|
|
# endif
|
|
# ifdef CONFIG_EBIU_DDRCTL3_VAL
|
|
/* default is disable, so don't need to force this */
|
|
bfin_write_EBIU_DDRCTL3(CONFIG_EBIU_DDRCTL3_VAL);
|
|
# endif
|
|
# ifdef CONFIG_EBIU_DDRQUE_VAL
|
|
bfin_write_EBIU_DDRQUE(bfin_read_EBIU_DDRQUE() | CONFIG_EBIU_DDRQUE_VAL);
|
|
# endif
|
|
#endif
|
|
|
|
serial_putc('e');
|
|
}
|
|
|
|
__attribute__((always_inline)) static inline void
|
|
check_hibernation(ADI_BOOT_DATA *bs, u16 vr_ctl, bool put_into_srfs)
|
|
{
|
|
serial_putc('a');
|
|
|
|
if (!CONFIG_MEM_SIZE)
|
|
return;
|
|
|
|
serial_putc('b');
|
|
|
|
/* Are we coming out of hibernate (suspend to memory) ?
|
|
* The memory layout is:
|
|
* 0x0: hibernate magic for anomaly 307 (0xDEADBEEF)
|
|
* 0x4: return address
|
|
* 0x8: stack pointer
|
|
*
|
|
* SCKELOW is unreliable on older parts (anomaly 307)
|
|
*/
|
|
if (ANOMALY_05000307 || vr_ctl & 0x8000) {
|
|
uint32_t *hibernate_magic = 0;
|
|
__builtin_bfin_ssync(); /* make sure memory controller is done */
|
|
if (hibernate_magic[0] == 0xDEADBEEF) {
|
|
serial_putc('c');
|
|
bfin_write_EVT15(hibernate_magic[1]);
|
|
bfin_write_IMASK(EVT_IVG15);
|
|
__asm__ __volatile__ (
|
|
/* load reti early to avoid anomaly 281 */
|
|
"reti = %0;"
|
|
/* clear hibernate magic */
|
|
"[%0] = %1;"
|
|
/* load stack pointer */
|
|
"SP = [%0 + 8];"
|
|
/* lower ourselves from reset ivg to ivg15 */
|
|
"raise 15;"
|
|
"rti;"
|
|
:
|
|
: "p"(hibernate_magic), "d"(0x2000 /* jump.s 0 */)
|
|
);
|
|
}
|
|
serial_putc('d');
|
|
}
|
|
|
|
serial_putc('e');
|
|
}
|
|
|
|
__attribute__((always_inline)) static inline void
|
|
program_async_controller(ADI_BOOT_DATA *bs)
|
|
{
|
|
serial_putc('a');
|
|
|
|
/* Program the async banks controller. */
|
|
bfin_write_EBIU_AMBCTL0(CONFIG_EBIU_AMBCTL0_VAL);
|
|
bfin_write_EBIU_AMBCTL1(CONFIG_EBIU_AMBCTL1_VAL);
|
|
bfin_write_EBIU_AMGCTL(CONFIG_EBIU_AMGCTL_VAL);
|
|
|
|
serial_putc('b');
|
|
|
|
/* Not all parts have these additional MMRs. */
|
|
#ifdef EBIU_MODE
|
|
# ifdef CONFIG_EBIU_MBSCTL_VAL
|
|
bfin_write_EBIU_MBSCTL(CONFIG_EBIU_MBSCTL_VAL);
|
|
# endif
|
|
# ifdef CONFIG_EBIU_MODE_VAL
|
|
bfin_write_EBIU_MODE(CONFIG_EBIU_MODE_VAL);
|
|
# endif
|
|
# ifdef CONFIG_EBIU_FCTL_VAL
|
|
bfin_write_EBIU_FCTL(CONFIG_EBIU_FCTL_VAL);
|
|
# endif
|
|
#endif
|
|
|
|
serial_putc('c');
|
|
}
|
|
|
|
BOOTROM_CALLED_FUNC_ATTR
|
|
void initcode(ADI_BOOT_DATA *bs)
|
|
{
|
|
ADI_BOOT_DATA bootstruct_scratch;
|
|
|
|
/* Setup NMI handler before anything else */
|
|
program_nmi_handler();
|
|
|
|
serial_init();
|
|
|
|
serial_putc('A');
|
|
|
|
/* If the bootstruct is NULL, then it's because we're loading
|
|
* dynamically and not via LDR (bootrom). So set the struct to
|
|
* some scratch space.
|
|
*/
|
|
if (!bs)
|
|
bs = &bootstruct_scratch;
|
|
|
|
serial_putc('B');
|
|
bool put_into_srfs = maybe_self_refresh(bs);
|
|
|
|
serial_putc('C');
|
|
uint sdivB, divB, vcoB;
|
|
program_early_devices(bs, &sdivB, &divB, &vcoB);
|
|
|
|
serial_putc('D');
|
|
u16 vr_ctl = program_clocks(bs, put_into_srfs);
|
|
|
|
serial_putc('E');
|
|
update_serial_clocks(bs, sdivB, divB, vcoB);
|
|
|
|
serial_putc('F');
|
|
program_memory_controller(bs, put_into_srfs);
|
|
|
|
serial_putc('G');
|
|
check_hibernation(bs, vr_ctl, put_into_srfs);
|
|
|
|
serial_putc('H');
|
|
program_async_controller(bs);
|
|
|
|
#ifdef CONFIG_BFIN_BOOTROM_USES_EVT1
|
|
serial_putc('I');
|
|
/* Tell the bootrom where our entry point is so that it knows
|
|
* where to jump to when finishing processing the LDR. This
|
|
* allows us to avoid small jump blocks in the LDR, and also
|
|
* works around anomaly 05000389 (init address in external
|
|
* memory causes bootrom to trigger external addressing IVHW).
|
|
*/
|
|
if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS)
|
|
bfin_write_EVT1(CONFIG_SYS_MONITOR_BASE);
|
|
#endif
|
|
|
|
serial_putc('>');
|
|
serial_putc('\n');
|
|
|
|
serial_deinit();
|
|
}
|