diff options
Diffstat (limited to 'cpu/blackfin/start.S')
| -rw-r--r-- | cpu/blackfin/start.S | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/cpu/blackfin/start.S b/cpu/blackfin/start.S index 7cbd632..7a3abba 100644 --- a/cpu/blackfin/start.S +++ b/cpu/blackfin/start.S @@ -95,6 +95,7 @@ ENTRY(_start) /* Save RETX so we can pass it while booting Linux */ r7 = RETX; +#if CONFIG_MEM_SIZE /* Figure out where we are currently executing so that we can decide * how to best reprogram and relocate things. We'll pass below: * R4: load address of _start @@ -131,6 +132,9 @@ ENTRY(_start) r3.h = 0x2000; cc = r5 < r3 (iu); if cc jump .Ldma_and_reprogram; +#else + r6 = 1 (x); /* fake loaded_from_ldr = 1 */ +#endif r0 = 0 (x); /* set bootstruct to NULL */ call _initcode; jump .Lprogrammed; @@ -139,11 +143,10 @@ ENTRY(_start) .Ldma_and_reprogram: r0.l = LO(L1_INST_SRAM); r0.h = HI(L1_INST_SRAM); - r1.l = __initcode_start; - r1.h = __initcode_start; - r2.l = __initcode_end; - r2.h = __initcode_end; - r2 = r2 - r1; /* convert r2 into length of initcode */ + r1.l = __initcode_lma; + r1.h = __initcode_lma; + r2.l = __initcode_len; + r2.h = __initcode_len; r1 = r1 - r4; /* convert r1 from load address of initcode ... */ r1 = r1 + r5; /* ... to current (not load) address of initcode */ p3 = r0; @@ -155,6 +158,7 @@ ENTRY(_start) .Lprogrammed: serial_early_set_baud +#if CONFIG_MEM_SIZE /* Relocate from wherever we are (FLASH/RAM/etc...) to the hardcoded * monitor location in the end of RAM. We know that memcpy() only * uses registers, so it is safe to call here. Note that this only @@ -167,18 +171,18 @@ ENTRY(_start) r2.l = LO(CONFIG_SYS_MONITOR_LEN); r2.h = HI(CONFIG_SYS_MONITOR_LEN); call _memcpy_ASM; +#endif /* Initialize BSS section ... we know that memset() does not * use the BSS, so it is safe to call here. The bootrom LDR * takes care of clearing things for us. */ serial_early_puts("Zero BSS"); - r0.l = __bss_start; - r0.h = __bss_start; + r0.l = __bss_vma; + r0.h = __bss_vma; r1 = 0 (x); - r2.l = __bss_end; - r2.h = __bss_end; - r2 = r2 - r0; + r2.l = __bss_len; + r2.h = __bss_len; call _memset; .Lnorelocate: |