[U-Boot] [PATCH 08/12] sh: add shared relocate_code() function and call board_init_r()

[Vladimir Zapolskiy]

Commits b61e90e6fd83 ("sh: Drop the arch-specific board init") and
f41e6088eb1a ("sh: Fix build errors for generic board") left code and
data relocation done in start.S, however further actual U-boot
configuration is not started anymore. Practically SH boards with the
code relocated into the expected position by start.S still can be
booted, so the change adds this option and provides an option how to
relocate code for board_init_r() execution.

Signed-off-by: Vladimir Zapolskiy <vz at mleia.com>
---
 arch/sh/cpu/sh2/cpu.c |  6 ------
 arch/sh/cpu/sh3/cpu.c |  6 ------
 arch/sh/cpu/sh4/cpu.c |  6 ------
 arch/sh/lib/board.c   | 18 ++++++++++++++++++
 4 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/arch/sh/cpu/sh2/cpu.c b/arch/sh/cpu/sh2/cpu.c
index 9a93cf5..a2f856f 100644
--- a/arch/sh/cpu/sh2/cpu.c
+++ b/arch/sh/cpu/sh2/cpu.c
@@ -83,9 +83,3 @@ int dcache_status(void)
 {
 	return 0;
 }
-
-void relocate_code(ulong start_addr_sp, gd_t *new_gd, ulong relocaaddr)
-{
-	/* TODO(sh maintainer): Implement this */
-	while (1);
-}
diff --git a/arch/sh/cpu/sh3/cpu.c b/arch/sh/cpu/sh3/cpu.c
index 494f908..ea0006a 100644
--- a/arch/sh/cpu/sh3/cpu.c
+++ b/arch/sh/cpu/sh3/cpu.c
@@ -66,9 +66,3 @@ int dcache_status(void)
 {
 	return 0;
 }
-
-void relocate_code(ulong start_addr_sp, gd_t *new_gd, ulong relocaaddr)
-{
-	/* TODO(sh maintainer): Implement this */
-	while (1);
-}
diff --git a/arch/sh/cpu/sh4/cpu.c b/arch/sh/cpu/sh4/cpu.c
index de90ca7..e8ee0a4 100644
--- a/arch/sh/cpu/sh4/cpu.c
+++ b/arch/sh/cpu/sh4/cpu.c
@@ -75,9 +75,3 @@ int cpu_eth_init(bd_t *bis)
 #endif
 	return 0;
 }
-
-void relocate_code(ulong start_addr_sp, gd_t *new_gd, ulong relocaaddr)
-{
-	/* TODO(sh maintainer): Implement this */
-	while (1);
-}
diff --git a/arch/sh/lib/board.c b/arch/sh/lib/board.c
index 7cb594e..aa967c0 100644
--- a/arch/sh/lib/board.c
+++ b/arch/sh/lib/board.c
@@ -15,3 +15,21 @@ int dram_init(void)
 
 	return 0;
 }
+
+void relocate_code(ulong start_addr_sp, gd_t *new_gd, ulong relocaddr)
+{
+	void (*reloc_board_init_r)(gd_t *gd, ulong dest) = board_init_r;
+
+	if (new_gd->reloc_off) {
+		memcpy((void *)new_gd->relocaddr,
+		       (void *)(new_gd->relocaddr - new_gd->reloc_off),
+		       new_gd->mon_len);
+
+		reloc_board_init_r += new_gd->reloc_off;
+	}
+
+	__asm__ __volatile__("mov.l %0, r15\n" : : "m" (new_gd->start_addr_sp));
+
+	while (1)
+		reloc_board_init_r(new_gd, 0x0);
+}
-- 
2.8.1