Blackfin: move section length calculation to linker script

The length of the sections is fixed at link time, so let the linker do the
calculation rather than doing it ourselves at runtime.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

cpu/blackfin/cpu.c

@@ -25,13 +25,12 @@ ulong bfin_poweron_retx;
 __attribute__ ((__noreturn__))
 void cpu_init_f(ulong bootflag, ulong loaded_from_ldr)
 {
-	extern char _stext_l1;
 #ifndef CONFIG_BFIN_BOOTROM_USES_EVT1
 	/* Build a NOP slide over the LDR jump block.  Whee! */
 	char nops[0xC];
 	serial_early_puts("NOP Slide\n");
 	memset(nops, 0x00, sizeof(nops));
-	memcpy(&_stext_l1 - sizeof(nops), nops, sizeof(nops));
+	memcpy((void *)L1_INST_SRAM, nops, sizeof(nops));
 #endif
 
 	if (!loaded_from_ldr) {
@@ -40,10 +39,10 @@ void cpu_init_f(ulong bootflag, ulong loaded_from_ldr)
 		 * checking at build time.
 		 */
 		serial_early_puts("L1 Relocate\n");
-		extern char _stext_l1, _etext_l1, _stext_l1_lma;
-		memcpy(&_stext_l1, &_stext_l1_lma, (&_etext_l1 - &_stext_l1));
-		extern char _sdata_l1, _edata_l1, _sdata_l1_lma;
-		memcpy(&_sdata_l1, &_sdata_l1_lma, (&_edata_l1 - &_sdata_l1));
+		extern char _stext_l1[], _text_l1_lma[], _text_l1_len[];
+		memcpy(&_stext_l1, &_text_l1_lma, (unsigned long)_text_l1_len);
+		extern char _sdata_l1[], _data_l1_lma[], _data_l1_len[];
+		memcpy(&_sdata_l1, &_data_l1_lma, (unsigned long)_data_l1_len);
 	}
 #if defined(__ADSPBF537__) || defined(__ADSPBF536__) || defined(__ADSPBF534__)
 	/* The BF537 bootrom will reset the EBIU_AMGCTL register on us

cpu/blackfin/start.S

@@ -139,11 +139,10 @@ 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;
@@ -173,12 +172,11 @@ ENTRY(_start)
 	 * 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:

lib_blackfin/u-boot.lds.S

@@ -65,16 +65,22 @@ MEMORY
 ENTRY(_start)
 SECTIONS
 {
-	.text :
+	.text.pre :
 	{
 		cpu/blackfin/start.o (.text .text.*)
 
 		LDS_BOARD_TEXT
+	} >ram_code
 
-		__initcode_start = .;
+	.text.init :
+	{
 		cpu/blackfin/initcode.o (.text .text.*)
-		__initcode_end = .;
+	} >ram_code
+	__initcode_lma = LOADADDR(.text.init);
+	__initcode_len = SIZEOF(.text.init);
 
+	.text :
+	{
 		*(.text .text.*)
 	} >ram
 
@@ -113,7 +119,9 @@ SECTIONS
 		. = ALIGN(4);
 		__etext_l1 = .;
 	} >l1_code AT>ram
-	__stext_l1_lma = LOADADDR(.text_l1);
+	__text_l1_lma = LOADADDR(.text_l1);
+	__text_l1_len = SIZEOF(.text_l1);
+	ASSERT (__text_l1_len <= L1_INST_SRAM_SIZE, "L1 text overflow!")
 
 	.data_l1 :
 	{
@@ -124,16 +132,18 @@ SECTIONS
 		. = ALIGN(4);
 		__edata_l1 = .;
 	} >l1_data AT>ram
-	__sdata_l1_lma = LOADADDR(.data_l1);
+	__data_l1_lma = LOADADDR(.data_l1);
+	__data_l1_len = SIZEOF(.data_l1);
+	ASSERT (__data_l1_len <= L1_DATA_B_SRAM_SIZE, "L1 data B overflow!")
 
 	.bss :
 	{
 		. = ALIGN(4);
-		__bss_start = .;
 		*(.sbss) *(.scommon)
 		*(.dynbss)
 		*(.bss .bss.*)
 		*(COMMON)
-		__bss_end = .;
 	} >ram
+	__bss_vma = ADDR(.bss);
+	__bss_len = SIZEOF(.bss);
 }