#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,
* 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 *argv[])
+int do_bootldr(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
void *addr;
- uint32_t *data;
/* Get the address */
if (argc < 2)
addr = (void *)simple_strtoul(argv[1], NULL, 16);
/* Check if it is a LDR file */
- data = addr;
-#if defined(__ADSPBF54x__) || defined(__ADSPBF52x__)
- if ((*data & 0xFF000000) == 0xAD000000 && data[2] == 0x00000000) {
-#else
- if (*data == 0xFF800060 || *data == 0xFF800040 || *data == 0xFF800020) {
-#endif
- /* We want to boot from FLASH or SDRAM */
+ if (ldr_valid_signature(addr)) {
printf("## Booting ldr image at 0x%p ...\n", addr);
+ ldr_load(addr);
icache_disable();
dcache_disable();
- __asm__(
- "jump (%1);"
- :
- : "q7" (addr), "a" (_BOOTROM_MEMBOOT));
+ ldr_exec(addr);
} else
printf("## No ldr image at address 0x%p\n", addr);
return 0;
}
-U_BOOT_CMD(bootldr, 2, 0, do_bootldr,
- "bootldr - boot ldr image from memory\n",
+U_BOOT_CMD(
+ bootldr, 2, 0, do_bootldr,
+ "boot ldr image from memory",
"[addr]\n"
- " - boot ldr image stored in memory\n");
+ ""
+);
projects / karo-tx-uboot.git / blobdiff