+++ /dev/null
-/*
- * U-boot - bootldr.c
- *
- * Copyright (c) 2005-2008 Analog Devices Inc.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <config.h>
-#include <common.h>
-#include <command.h>
-
-#include <asm/blackfin.h>
-#include <asm/mach-common/bits/bootrom.h>
-
-/* Simple sanity check on the specified address to make sure it contains
- * an LDR image of some sort.
- */
-static bool ldr_valid_signature(uint8_t *data)
-{
-#if defined(__ADSPBF561__)
-
- /* BF56x has a 4 byte global header */
- if (data[3] == (GFLAG_56X_SIGN_MAGIC << (GFLAG_56X_SIGN_SHIFT - 24)))
- return true;
-
-#elif defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__) || \
- defined(__ADSPBF534__) || defined(__ADSPBF536__) || defined(__ADSPBF537__) || \
- defined(__ADSPBF538__) || defined(__ADSPBF539__)
-
- /* all the BF53x should start at this address mask */
- uint32_t addr;
- memmove(&addr, data, sizeof(addr));
- if ((addr & 0xFF0FFF0F) == 0xFF000000)
- return true;
-#else
-
- /* everything newer has a magic byte */
- uint32_t count;
- memmove(&count, data + 8, sizeof(count));
- if (data[3] == 0xAD && count == 0)
- return true;
-
-#endif
-
- return false;
-}
-
-/* If the Blackfin is new enough, the Blackfin on-chip ROM supports loading
- * LDRs from random memory addresses. So whenever possible, use that. In
- * the older cases (BF53x/BF561), parse the LDR format ourselves.
- */
-static void ldr_load(uint8_t *base_addr)
-{
-#if defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__) || \
- /*defined(__ADSPBF534__) || defined(__ADSPBF536__) || defined(__ADSPBF537__) ||*/\
- defined(__ADSPBF538__) || defined(__ADSPBF539__) || defined(__ADSPBF561__)
-
- uint32_t addr;
- uint32_t count;
- uint16_t flags;
-
- /* the bf56x has a 4 byte global header ... but it is useless to
- * us when booting an LDR from a memory address, so skip it
- */
-# ifdef __ADSPBF561__
- base_addr += 4;
-# endif
-
- memmove(&flags, base_addr + 8, sizeof(flags));
- bfin_write_EVT1(flags & BFLAG_53X_RESVECT ? 0xFFA00000 : 0xFFA08000);
-
- do {
- /* block header may not be aligned */
- memmove(&addr, base_addr, sizeof(addr));
- memmove(&count, base_addr+4, sizeof(count));
- memmove(&flags, base_addr+8, sizeof(flags));
- base_addr += sizeof(addr) + sizeof(count) + sizeof(flags);
-
- printf("loading to 0x%08x (%#x bytes) flags: 0x%04x\n",
- addr, count, flags);
-
- if (!(flags & BFLAG_53X_IGNORE)) {
- if (flags & BFLAG_53X_ZEROFILL)
- memset((void *)addr, 0x00, count);
- else
- memcpy((void *)addr, base_addr, count);
-
- if (flags & BFLAG_53X_INIT) {
- void (*init)(void) = (void *)addr;
- init();
- }
- }
-
- if (!(flags & BFLAG_53X_ZEROFILL))
- base_addr += count;
- } while (!(flags & BFLAG_53X_FINAL));
-
-#endif
-}
-
-/* For BF537, we use the _BOOTROM_BOOT_DXE_FLASH funky ROM function.
- * For all other BF53x/BF56x, we just call the entry point.
- * For everything else (newer), we use _BOOTROM_MEMBOOT ROM function.
- */
-static void ldr_exec(void *addr)
-{
-#if defined(__ADSPBF534__) || defined(__ADSPBF536__) || defined(__ADSPBF537__)
-
- /* restore EVT1 to reset value as this is what the bootrom uses as
- * the default entry point when booting the final block of LDRs
- */
- bfin_write_EVT1(L1_INST_SRAM);
- __asm__("call (%0);" : : "a"(_BOOTROM_MEMBOOT), "q7"(addr) : "RETS", "memory");
-
-#elif defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__) || \
- defined(__ADSPBF538__) || defined(__ADSPBF539__) || defined(__ADSPBF561__)
-
- void (*ldr_entry)(void) = (void *)bfin_read_EVT1();
- ldr_entry();
-
-#else
-
- int32_t (*BOOTROM_MEM)(void *, int32_t, int32_t, void *) = (void *)_BOOTROM_MEMBOOT;
- BOOTROM_MEM(addr, 0, 0, NULL);
-
-#endif
-}
-
-/*
- * the bootldr command loads an address, checks to see if there
- * is a Boot stream that the on-chip BOOTROM can understand,
- * and loads it via the BOOTROM Callback. It is possible
- * to also add booting from SPI, or TWI, but this function does
- * not currently support that.
- */
-int do_bootldr(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
-{
- void *addr;
-
- /* Get the address */
- if (argc < 2)
- addr = (void *)load_addr;
- else
- addr = (void *)simple_strtoul(argv[1], NULL, 16);
-
- /* Check if it is a LDR file */
- if (ldr_valid_signature(addr)) {
- printf("## Booting ldr image at 0x%p ...\n", addr);
- ldr_load(addr);
-
- icache_disable();
- dcache_disable();
-
- ldr_exec(addr);
- } else
- printf("## No ldr image at address 0x%p\n", addr);
-
- return 0;
-}
-
-U_BOOT_CMD(
- bootldr, 2, 0, do_bootldr,
- "boot ldr image from memory",
- "[addr]\n"
- ""
-);
projects / u-boot / blobdiff