firmware: remove FW_TEXT_START

Now opensbi can run at any address via dynamic relocation. We can
remove FW_TEXT_START.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Anup Patel <anup@brainfault.org>

firmware/fw_base.S

@@ -53,9 +53,7 @@ _try_lottery:
 	bnez	a6, _wait_for_boot_hart
 
 	/* relocate the global table content */
-	li	t0, FW_TEXT_START	/* link start */
-	lla	t1, _fw_start		/* load start */
-	sub	t2, t1, t0		/* load offset */
+	lla	t2, _fw_start
 	lla	t0, __rel_dyn_start
 	lla	t1, __rel_dyn_end
 	beq	t0, t1, _relocate_done

firmware/fw_base.ldS

@@ -7,8 +7,7 @@
  *   Anup Patel <anup.patel@wdc.com>
  */
 
-	. = FW_TEXT_START;
-	/* Don't add any section between FW_TEXT_START and _fw_start */
+	/* Don't add any section before _fw_start */
 	PROVIDE(_fw_start = .);
 
 	. = ALIGN(0x1000); /* Need this to create proper sections */

firmware/fw_payload.elf.ldS

@@ -15,7 +15,7 @@ SECTIONS
 	#include "fw_base.ldS"
 
 #ifdef FW_PAYLOAD_OFFSET
-	. = FW_TEXT_START + FW_PAYLOAD_OFFSET;
+	. = FW_PAYLOAD_OFFSET;
 #else
 	. = ALIGN(FW_PAYLOAD_ALIGN);
 #endif

firmware/objects.mk

@@ -13,10 +13,6 @@ firmware-cflags-y +=
 firmware-asflags-y +=
 firmware-ldflags-y +=
 
-ifdef FW_TEXT_START
-firmware-genflags-y += -DFW_TEXT_START=$(FW_TEXT_START)
-endif
-
 ifdef FW_FDT_PATH
 firmware-genflags-y += -DFW_FDT_PATH=\"$(FW_FDT_PATH)\"
 ifdef FW_FDT_PADDING

firmware/payloads/test.elf.ldS

@@ -13,7 +13,7 @@ ENTRY(_start)
 SECTIONS
 {
 #ifdef FW_PAYLOAD_OFFSET
-	. = FW_TEXT_START + FW_PAYLOAD_OFFSET;
+	. = FW_PAYLOAD_OFFSET;
 #else
 	. = ALIGN(FW_PAYLOAD_ALIGN);
 #endif