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author | H. Nikolaus Schaller <hns@goldelico.com> | 2012-03-26 20:55:28 +0200 |
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committer | H. Nikolaus Schaller <hns@goldelico.com> | 2012-03-26 20:55:28 +0200 |
commit | 92988a21ad4c4c9504295ccb580c9f806134471b (patch) | |
tree | 5effc9f14170112450de05c67dafbe8d5034d595 /u-boot/arch/blackfin/cpu/initcode.c | |
parent | ca2b506783b676c95762c54ea24dcfdaae1947c9 (diff) | |
download | bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.zip bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.tar.gz bootable_bootloader_goldelico_gta04-92988a21ad4c4c9504295ccb580c9f806134471b.tar.bz2 |
added boot script files to repository
Diffstat (limited to 'u-boot/arch/blackfin/cpu/initcode.c')
-rw-r--r-- | u-boot/arch/blackfin/cpu/initcode.c | 721 |
1 files changed, 721 insertions, 0 deletions
diff --git a/u-boot/arch/blackfin/cpu/initcode.c b/u-boot/arch/blackfin/cpu/initcode.c new file mode 100644 index 0000000..433d477 --- /dev/null +++ b/u-boot/arch/blackfin/cpu/initcode.c @@ -0,0 +1,721 @@ +/* + * initcode.c - Initialize the processor. This is usually entails things + * like external memory, voltage regulators, etc... Note that this file + * cannot make any function calls as it may be executed all by itself by + * the Blackfin's bootrom in LDR format. + * + * Copyright (c) 2004-2008 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#define BFIN_IN_INITCODE + +#include <config.h> +#include <asm/blackfin.h> +#include <asm/mach-common/bits/bootrom.h> +#include <asm/mach-common/bits/core.h> +#include <asm/mach-common/bits/ebiu.h> +#include <asm/mach-common/bits/pll.h> +#include <asm/mach-common/bits/uart.h> + +#include "serial.h" + +__attribute__((always_inline)) +static inline void serial_init(void) +{ +#ifdef __ADSPBF54x__ +# ifdef BFIN_BOOT_UART_USE_RTS +# define BFIN_UART_USE_RTS 1 +# else +# define BFIN_UART_USE_RTS 0 +# endif + if (BFIN_UART_USE_RTS && CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) { + size_t i; + + /* force RTS rather than relying on auto RTS */ + bfin_write16(&pUART->mcr, bfin_read16(&pUART->mcr) | FCPOL); + + /* Wait for the line to clear up. We cannot rely on UART + * registers as none of them reflect the status of the RSR. + * Instead, we'll sleep for ~10 bit times at 9600 baud. + * We can precalc things here by assuming boot values for + * PLL rather than loading registers and calculating. + * baud = SCLK / (16 ^ (1 - EDBO) * Divisor) + * EDB0 = 0 + * Divisor = (SCLK / baud) / 16 + * SCLK = baud * 16 * Divisor + * SCLK = (0x14 * CONFIG_CLKIN_HZ) / 5 + * CCLK = (16 * Divisor * 5) * (9600 / 10) + * In reality, this will probably be just about 1 second delay, + * so assuming 9600 baud is OK (both as a very low and too high + * speed as this will buffer things enough). + */ +#define _NUMBITS (10) /* how many bits to delay */ +#define _LOWBAUD (9600) /* low baud rate */ +#define _SCLK ((0x14 * CONFIG_CLKIN_HZ) / 5) /* SCLK based on PLL */ +#define _DIVISOR ((_SCLK / _LOWBAUD) / 16) /* UART DLL/DLH */ +#define _NUMINS (3) /* how many instructions in loop */ +#define _CCLK (((16 * _DIVISOR * 5) * (_LOWBAUD / _NUMBITS)) / _NUMINS) + i = _CCLK; + while (i--) + asm volatile("" : : : "memory"); + } +#endif + + if (BFIN_DEBUG_EARLY_SERIAL) { + int ucen = bfin_read16(&pUART->gctl) & UCEN; + serial_early_init(); + + /* If the UART is off, that means we need to program + * the baud rate ourselves initially. + */ + if (ucen != UCEN) + serial_early_set_baud(CONFIG_BAUDRATE); + } +} + +__attribute__((always_inline)) +static inline void serial_deinit(void) +{ +#ifdef __ADSPBF54x__ + if (BFIN_UART_USE_RTS && CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) { + /* clear forced RTS rather than relying on auto RTS */ + bfin_write16(&pUART->mcr, bfin_read16(&pUART->mcr) & ~FCPOL); + } +#endif +} + +__attribute__((always_inline)) +static inline void serial_putc(char c) +{ + if (!BFIN_DEBUG_EARLY_SERIAL) + return; + + if (c == '\n') + serial_putc('\r'); + + bfin_write16(&pUART->thr, c); + + while (!(bfin_read16(&pUART->lsr) & TEMT)) + continue; +} + +__attribute__((always_inline)) static inline void +program_nmi_handler(void) +{ + u32 tmp1, tmp2; + + /* Older bootroms don't create a dummy NMI handler, + * so make one ourselves ASAP in case it fires. + */ + if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS && !ANOMALY_05000219) + return; + + asm volatile ( + "%0 = RETS;" /* Save current RETS */ + "CALL 1f;" /* Figure out current PC */ + "RTN;" /* The simple NMI handler */ + "1:" + "%1 = RETS;" /* Load addr of NMI handler */ + "RETS = %0;" /* Restore RETS */ + "[%2] = %1;" /* Write NMI handler */ + : "=r"(tmp1), "=r"(tmp2) : "ab"(EVT2) + ); +} + +/* Max SCLK can be 133MHz ... dividing that by (2*4) gives + * us a freq of 16MHz for SPI which should generally be + * slow enough for the slow reads the bootrom uses. + */ +#if !defined(CONFIG_SPI_FLASH_SLOW_READ) && \ + ((defined(__ADSPBF52x__) && __SILICON_REVISION__ >= 2) || \ + (defined(__ADSPBF54x__) && __SILICON_REVISION__ >= 1)) +# define BOOTROM_SUPPORTS_SPI_FAST_READ 1 +#else +# define BOOTROM_SUPPORTS_SPI_FAST_READ 0 +#endif +#ifndef CONFIG_SPI_BAUD_INITBLOCK +# define CONFIG_SPI_BAUD_INITBLOCK (BOOTROM_SUPPORTS_SPI_FAST_READ ? 2 : 4) +#endif +#ifdef SPI0_BAUD +# define bfin_write_SPI_BAUD bfin_write_SPI0_BAUD +#endif + +/* PLL_DIV defines */ +#ifndef CONFIG_PLL_DIV_VAL +# if (CONFIG_CCLK_DIV == 1) +# define CONFIG_CCLK_ACT_DIV CCLK_DIV1 +# elif (CONFIG_CCLK_DIV == 2) +# define CONFIG_CCLK_ACT_DIV CCLK_DIV2 +# elif (CONFIG_CCLK_DIV == 4) +# define CONFIG_CCLK_ACT_DIV CCLK_DIV4 +# elif (CONFIG_CCLK_DIV == 8) +# define CONFIG_CCLK_ACT_DIV CCLK_DIV8 +# else +# define CONFIG_CCLK_ACT_DIV CONFIG_CCLK_DIV_not_defined_properly +# endif +# define CONFIG_PLL_DIV_VAL (CONFIG_CCLK_ACT_DIV | CONFIG_SCLK_DIV) +#endif + +#ifndef CONFIG_PLL_LOCKCNT_VAL +# define CONFIG_PLL_LOCKCNT_VAL 0x0300 +#endif + +#ifndef CONFIG_PLL_CTL_VAL +# define CONFIG_PLL_CTL_VAL (SPORT_HYST | (CONFIG_VCO_MULT << 9) | CONFIG_CLKIN_HALF) +#endif + +#ifndef CONFIG_EBIU_RSTCTL_VAL +# define CONFIG_EBIU_RSTCTL_VAL 0 /* only MDDRENABLE is useful */ +#endif +#if ((CONFIG_EBIU_RSTCTL_VAL & 0xFFFFFFC4) != 0) +# error invalid EBIU_RSTCTL value: must not set reserved bits +#endif + +#ifndef CONFIG_EBIU_MBSCTL_VAL +# define CONFIG_EBIU_MBSCTL_VAL 0 +#endif + +#if defined(CONFIG_EBIU_DDRQUE_VAL) && ((CONFIG_EBIU_DDRQUE_VAL & 0xFFFF8000) != 0) +# error invalid EBIU_DDRQUE value: must not set reserved bits +#endif + +/* Make sure our voltage value is sane so we don't blow up! */ +#ifndef CONFIG_VR_CTL_VAL +# define BFIN_CCLK ((CONFIG_CLKIN_HZ * CONFIG_VCO_MULT) / CONFIG_CCLK_DIV) +# if defined(__ADSPBF533__) || defined(__ADSPBF532__) || defined(__ADSPBF531__) +# define CCLK_VLEV_120 400000000 +# define CCLK_VLEV_125 533000000 +# elif defined(__ADSPBF537__) || defined(__ADSPBF536__) || defined(__ADSPBF534__) +# define CCLK_VLEV_120 401000000 +# define CCLK_VLEV_125 401000000 +# elif defined(__ADSPBF561__) +# define CCLK_VLEV_120 300000000 +# define CCLK_VLEV_125 501000000 +# endif +# if BFIN_CCLK < CCLK_VLEV_120 +# define CONFIG_VR_CTL_VLEV VLEV_120 +# elif BFIN_CCLK < CCLK_VLEV_125 +# define CONFIG_VR_CTL_VLEV VLEV_125 +# else +# define CONFIG_VR_CTL_VLEV VLEV_130 +# endif +# if defined(__ADSPBF52x__) /* TBD; use default */ +# undef CONFIG_VR_CTL_VLEV +# define CONFIG_VR_CTL_VLEV VLEV_110 +# elif defined(__ADSPBF54x__) /* TBD; use default */ +# undef CONFIG_VR_CTL_VLEV +# define CONFIG_VR_CTL_VLEV VLEV_120 +# elif defined(__ADSPBF538__) || defined(__ADSPBF539__) /* TBD; use default */ +# undef CONFIG_VR_CTL_VLEV +# define CONFIG_VR_CTL_VLEV VLEV_125 +# endif + +# ifdef CONFIG_BFIN_MAC +# define CONFIG_VR_CTL_CLKBUF CLKBUFOE +# else +# define CONFIG_VR_CTL_CLKBUF 0 +# endif + +# if defined(__ADSPBF52x__) +# define CONFIG_VR_CTL_FREQ FREQ_1000 +# else +# define CONFIG_VR_CTL_FREQ (GAIN_20 | FREQ_1000) +# endif + +# define CONFIG_VR_CTL_VAL (CONFIG_VR_CTL_CLKBUF | CONFIG_VR_CTL_VLEV | CONFIG_VR_CTL_FREQ) +#endif + +/* some parts do not have an on-chip voltage regulator */ +#if defined(__ADSPBF51x__) +# define CONFIG_HAS_VR 0 +# undef CONFIG_VR_CTL_VAL +# define CONFIG_VR_CTL_VAL 0 +#else +# define CONFIG_HAS_VR 1 +#endif + +#if CONFIG_MEM_SIZE +#ifndef EBIU_RSTCTL +/* Blackfin with SDRAM */ +#ifndef CONFIG_EBIU_SDBCTL_VAL +# if CONFIG_MEM_SIZE == 16 +# define CONFIG_EBSZ_VAL EBSZ_16 +# elif CONFIG_MEM_SIZE == 32 +# define CONFIG_EBSZ_VAL EBSZ_32 +# elif CONFIG_MEM_SIZE == 64 +# define CONFIG_EBSZ_VAL EBSZ_64 +# elif CONFIG_MEM_SIZE == 128 +# define CONFIG_EBSZ_VAL EBSZ_128 +# elif CONFIG_MEM_SIZE == 256 +# define CONFIG_EBSZ_VAL EBSZ_256 +# elif CONFIG_MEM_SIZE == 512 +# define CONFIG_EBSZ_VAL EBSZ_512 +# else +# error You need to define CONFIG_EBIU_SDBCTL_VAL or CONFIG_MEM_SIZE +# endif +# if CONFIG_MEM_ADD_WDTH == 8 +# define CONFIG_EBCAW_VAL EBCAW_8 +# elif CONFIG_MEM_ADD_WDTH == 9 +# define CONFIG_EBCAW_VAL EBCAW_9 +# elif CONFIG_MEM_ADD_WDTH == 10 +# define CONFIG_EBCAW_VAL EBCAW_10 +# elif CONFIG_MEM_ADD_WDTH == 11 +# define CONFIG_EBCAW_VAL EBCAW_11 +# else +# error You need to define CONFIG_EBIU_SDBCTL_VAL or CONFIG_MEM_ADD_WDTH +# endif +# define CONFIG_EBIU_SDBCTL_VAL (CONFIG_EBCAW_VAL | CONFIG_EBSZ_VAL | EBE) +#endif +#endif +#endif + +/* Conflicting Column Address Widths Causes SDRAM Errors: + * EB2CAW and EB3CAW must be the same + */ +#if ANOMALY_05000362 +# if ((CONFIG_EBIU_SDBCTL_VAL & 0x30000000) >> 8) != (CONFIG_EBIU_SDBCTL_VAL & 0x00300000) +# error "Anomaly 05000362: EB2CAW and EB3CAW must be the same" +# endif +#endif + +__attribute__((always_inline)) static inline void +program_early_devices(ADI_BOOT_DATA *bs, uint *sdivB, uint *divB, uint *vcoB) +{ + serial_putc('a'); + + /* Save the clock pieces that are used in baud rate calculation */ + if (BFIN_DEBUG_EARLY_SERIAL || CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_UART) { + serial_putc('b'); + *sdivB = bfin_read_PLL_DIV() & 0xf; + *vcoB = (bfin_read_PLL_CTL() >> 9) & 0x3f; + *divB = serial_early_get_div(); + serial_putc('c'); + } + + serial_putc('d'); + +#ifdef CONFIG_HW_WATCHDOG +# ifndef CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE +# define CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE 20000 +# endif + /* Program the watchdog with an initial timeout of ~20 seconds. + * Hopefully that should be long enough to load the u-boot LDR + * (from wherever) and then the common u-boot code can take over. + * In bypass mode, the start.S would have already set a much lower + * timeout, so don't clobber that. + */ + if (CONFIG_BFIN_BOOT_MODE != BFIN_BOOT_BYPASS) { + serial_putc('e'); + bfin_write_WDOG_CNT(MSEC_TO_SCLK(CONFIG_HW_WATCHDOG_TIMEOUT_INITCODE)); + bfin_write_WDOG_CTL(0); + serial_putc('f'); + } +#endif + + serial_putc('g'); + + /* Blackfin bootroms use the SPI slow read opcode instead of the SPI + * fast read, so we need to slow down the SPI clock a lot more during + * boot. Once we switch over to u-boot's SPI flash driver, we'll + * increase the speed appropriately. + */ + if (CONFIG_BFIN_BOOT_MODE == BFIN_BOOT_SPI_MASTER) { + serial_putc('h'); + if (BOOTROM_SUPPORTS_SPI_FAST_READ && CONFIG_SPI_BAUD_INITBLOCK < 4) + bs->dFlags |= BFLAG_FASTREAD; + bfin_write_SPI_BAUD(CONFIG_SPI_BAUD_INITBLOCK); + serial_putc('i'); + } + + serial_putc('j'); +} + +__attribute__((always_inline)) static inline bool +maybe_self_refresh(ADI_BOOT_DATA *bs) +{ + serial_putc('a'); + + if (!CONFIG_MEM_SIZE) + return false; + + /* If external memory is enabled, put it into self refresh first. */ +#ifdef EBIU_RSTCTL + if (bfin_read_EBIU_RSTCTL() & DDR_SRESET) { + serial_putc('b'); + bfin_write_EBIU_RSTCTL(bfin_read_EBIU_RSTCTL() | SRREQ); + return true; + } +#else + if (bfin_read_EBIU_SDBCTL() & EBE) { + serial_putc('b'); + bfin_write_EBIU_SDGCTL(bfin_read_EBIU_SDGCTL() | SRFS); + return true; + } +#endif + + serial_putc('c'); + + return false; +} + +__attribute__((always_inline)) static inline u16 +program_clocks(ADI_BOOT_DATA *bs, bool put_into_srfs) +{ + u16 vr_ctl; + + serial_putc('a'); + + vr_ctl = bfin_read_VR_CTL(); + + serial_putc('b'); + + /* If we're entering self refresh, make sure it has happened. */ + if (put_into_srfs) +#ifdef EBIU_RSTCTL + while (!(bfin_read_EBIU_RSTCTL() & SRACK)) +#else + while (!(bfin_read_EBIU_SDSTAT() & SDSRA)) +#endif + continue; + + serial_putc('c'); + + /* With newer bootroms, we use the helper function to set up + * the memory controller. Older bootroms lacks such helpers + * so we do it ourselves. + */ + if (!ANOMALY_05000386) { + serial_putc('d'); + + /* Always programming PLL_LOCKCNT avoids Anomaly 05000430 */ + ADI_SYSCTRL_VALUES memory_settings; + uint32_t actions = SYSCTRL_WRITE | SYSCTRL_PLLCTL | SYSCTRL_LOCKCNT; + if (!ANOMALY_05000440) + actions |= SYSCTRL_PLLDIV; + if (CONFIG_HAS_VR) { + actions |= SYSCTRL_VRCTL; + if (CONFIG_VR_CTL_VAL & FREQ_MASK) + actions |= SYSCTRL_INTVOLTAGE; + else + actions |= SYSCTRL_EXTVOLTAGE; + memory_settings.uwVrCtl = CONFIG_VR_CTL_VAL; + } else + actions |= SYSCTRL_EXTVOLTAGE; + memory_settings.uwPllCtl = CONFIG_PLL_CTL_VAL; + memory_settings.uwPllDiv = CONFIG_PLL_DIV_VAL; + memory_settings.uwPllLockCnt = CONFIG_PLL_LOCKCNT_VAL; +#if ANOMALY_05000432 + bfin_write_SIC_IWR1(0); +#endif + serial_putc('e'); + bfrom_SysControl(actions, &memory_settings, NULL); + serial_putc('f'); + if (ANOMALY_05000440) + bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL); +#if ANOMALY_05000432 + bfin_write_SIC_IWR1(-1); +#endif +#if ANOMALY_05000171 + bfin_write_SICA_IWR0(-1); + bfin_write_SICA_IWR1(-1); +#endif + serial_putc('g'); + } else { + serial_putc('h'); + + /* Disable all peripheral wakeups except for the PLL event. */ +#ifdef SIC_IWR0 + bfin_write_SIC_IWR0(1); + bfin_write_SIC_IWR1(0); +# ifdef SIC_IWR2 + bfin_write_SIC_IWR2(0); +# endif +#elif defined(SICA_IWR0) + bfin_write_SICA_IWR0(1); + bfin_write_SICA_IWR1(0); +#else + bfin_write_SIC_IWR(1); +#endif + + serial_putc('i'); + + /* Always programming PLL_LOCKCNT avoids Anomaly 05000430 */ + bfin_write_PLL_LOCKCNT(CONFIG_PLL_LOCKCNT_VAL); + + serial_putc('j'); + + /* Only reprogram when needed to avoid triggering unnecessary + * PLL relock sequences. + */ + if (vr_ctl != CONFIG_VR_CTL_VAL) { + serial_putc('?'); + bfin_write_VR_CTL(CONFIG_VR_CTL_VAL); + asm("idle;"); + serial_putc('!'); + } + + serial_putc('k'); + + bfin_write_PLL_DIV(CONFIG_PLL_DIV_VAL); + + serial_putc('l'); + + /* Only reprogram when needed to avoid triggering unnecessary + * PLL relock sequences. + */ + 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(); +} |