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git.ipfire.org Git - people/ms/u-boot.git/blob - cmd/bootldr.c
4 * Copyright (c) 2005-2008 Analog Devices Inc.
6 * See file CREDITS for list of people who contributed to this
9 * Licensed under the GPL-2 or later.
16 #include <asm/blackfin.h>
17 #include <asm/mach-common/bits/bootrom.h>
19 /* Simple sanity check on the specified address to make sure it contains
20 * an LDR image of some sort.
22 static bool ldr_valid_signature(uint8_t *data
)
24 #if defined(__ADSPBF561__)
26 /* BF56x has a 4 byte global header */
27 if (data
[3] == (GFLAG_56X_SIGN_MAGIC
<< (GFLAG_56X_SIGN_SHIFT
- 24)))
30 #elif defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__) || \
31 defined(__ADSPBF534__) || defined(__ADSPBF536__) || defined(__ADSPBF537__) || \
32 defined(__ADSPBF538__) || defined(__ADSPBF539__)
34 /* all the BF53x should start at this address mask */
36 memmove(&addr
, data
, sizeof(addr
));
37 if ((addr
& 0xFF0FFF0F) == 0xFF000000)
41 /* everything newer has a magic byte */
43 memmove(&count
, data
+ 8, sizeof(count
));
44 if (data
[3] == 0xAD && count
== 0)
52 /* If the Blackfin is new enough, the Blackfin on-chip ROM supports loading
53 * LDRs from random memory addresses. So whenever possible, use that. In
54 * the older cases (BF53x/BF561), parse the LDR format ourselves.
56 static void ldr_load(uint8_t *base_addr
)
58 #if defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__) || \
59 /*defined(__ADSPBF534__) || defined(__ADSPBF536__) || defined(__ADSPBF537__) ||*/\
60 defined(__ADSPBF538__) || defined(__ADSPBF539__) || defined(__ADSPBF561__)
66 /* the bf56x has a 4 byte global header ... but it is useless to
67 * us when booting an LDR from a memory address, so skip it
73 memmove(&flags
, base_addr
+ 8, sizeof(flags
));
74 bfin_write_EVT1(flags
& BFLAG_53X_RESVECT
? 0xFFA00000 : 0xFFA08000);
77 /* block header may not be aligned */
78 memmove(&addr
, base_addr
, sizeof(addr
));
79 memmove(&count
, base_addr
+4, sizeof(count
));
80 memmove(&flags
, base_addr
+8, sizeof(flags
));
81 base_addr
+= sizeof(addr
) + sizeof(count
) + sizeof(flags
);
83 printf("loading to 0x%08x (%#x bytes) flags: 0x%04x\n",
86 if (!(flags
& BFLAG_53X_IGNORE
)) {
87 if (flags
& BFLAG_53X_ZEROFILL
)
88 memset((void *)addr
, 0x00, count
);
90 memcpy((void *)addr
, base_addr
, count
);
92 if (flags
& BFLAG_53X_INIT
) {
93 void (*init
)(void) = (void *)addr
;
98 if (!(flags
& BFLAG_53X_ZEROFILL
))
100 } while (!(flags
& BFLAG_53X_FINAL
));
105 /* For BF537, we use the _BOOTROM_BOOT_DXE_FLASH funky ROM function.
106 * For all other BF53x/BF56x, we just call the entry point.
107 * For everything else (newer), we use _BOOTROM_MEMBOOT ROM function.
109 static void ldr_exec(void *addr
)
111 #if defined(__ADSPBF534__) || defined(__ADSPBF536__) || defined(__ADSPBF537__)
113 /* restore EVT1 to reset value as this is what the bootrom uses as
114 * the default entry point when booting the final block of LDRs
116 bfin_write_EVT1(L1_INST_SRAM
);
117 __asm__("call (%0);" : : "a"(_BOOTROM_MEMBOOT
), "q7"(addr
) : "RETS", "memory");
119 #elif defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__) || \
120 defined(__ADSPBF538__) || defined(__ADSPBF539__) || defined(__ADSPBF561__)
122 void (*ldr_entry
)(void) = (void *)bfin_read_EVT1();
127 int32_t (*BOOTROM_MEM
)(void *, int32_t, int32_t, void *) = (void *)_BOOTROM_MEMBOOT
;
128 BOOTROM_MEM(addr
, 0, 0, NULL
);
134 * the bootldr command loads an address, checks to see if there
135 * is a Boot stream that the on-chip BOOTROM can understand,
136 * and loads it via the BOOTROM Callback. It is possible
137 * to also add booting from SPI, or TWI, but this function does
138 * not currently support that.
140 int do_bootldr(cmd_tbl_t
*cmdtp
, int flag
, int argc
, char * const argv
[])
144 /* Get the address */
146 addr
= (void *)load_addr
;
148 addr
= (void *)simple_strtoul(argv
[1], NULL
, 16);
150 /* Check if it is a LDR file */
151 if (ldr_valid_signature(addr
)) {
152 printf("## Booting ldr image at 0x%p ...\n", addr
);
160 printf("## No ldr image at address 0x%p\n", addr
);
166 bootldr
, 2, 0, do_bootldr
,
167 "boot ldr image from memory",