From b1e2c5519a06f9a5841a7a434bf4da4d393f8df5 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Tue, 3 Nov 2009 06:11:31 -0500
Subject: [PATCH] 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        | 11 +++++------
 cpu/blackfin/start.S      | 18 ++++++++----------
 lib_blackfin/u-boot.lds.S | 24 +++++++++++++++++-------
 3 files changed, 30 insertions(+), 23 deletions(-)

diff --git a/cpu/blackfin/cpu.c b/cpu/blackfin/cpu.c
index 9bb6407fc6..2c8fd86b86 100644
--- a/cpu/blackfin/cpu.c
+++ b/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
diff --git a/cpu/blackfin/start.S b/cpu/blackfin/start.S
index 7cbd632205..44e2725608 100644
--- a/cpu/blackfin/start.S
+++ b/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:
diff --git a/lib_blackfin/u-boot.lds.S b/lib_blackfin/u-boot.lds.S
index 3604b7888d..8a9e8b1c2b 100644
--- a/lib_blackfin/u-boot.lds.S
+++ b/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);
 }
-- 
2.30.2