ARC: bootm: Refactor GO and PREP subcommands implementation

Refactor GO and PREP subcommands implementation for a simpler
override in the boards platform code.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

arch/arc/lib/bootm.c

@@ -46,35 +46,47 @@ static int cleanup_before_linux(void)
 	return 0;
 }
 
+__weak int board_prep_linux(bootm_headers_t *images) { return 0; }
+
 /* Subcommand: PREP */
-static void boot_prep_linux(bootm_headers_t *images)
+static int boot_prep_linux(bootm_headers_t *images)
 {
-	if (image_setup_linux(images))
-		hang();
+	int ret;
+
+	ret = image_setup_linux(images);
+	if (ret)
+		return ret;
+
+	return board_prep_linux(images);
 }
 
-__weak void smp_set_core_boot_addr(unsigned long addr, int corenr) {}
-__weak void smp_kick_all_cpus(void) {}
+/* Generic implementation for single core CPU */
+__weak void board_jump_and_run(ulong entry, int zero, int arch, uint params)
+{
+	void (*kernel_entry)(int zero, int arch, uint params);
+
+	kernel_entry = (void (*)(int, int, uint))entry;
+
+	kernel_entry(zero, arch, params);
+}
 
 /* Subcommand: GO */
 static void boot_jump_linux(bootm_headers_t *images, int flag)
 {
-	void (*kernel_entry)(int zero, int arch, uint params);
+	ulong kernel_entry;
 	unsigned int r0, r2;
 	int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
 
-	kernel_entry = (void (*)(int, int, uint))images->ep;
+	kernel_entry = images->ep;
 
 	debug("## Transferring control to Linux (at address %08lx)...\n",
-	      (ulong) kernel_entry);
+	      kernel_entry);
 	bootstage_mark(BOOTSTAGE_ID_RUN_OS);
 
 	printf("\nStarting kernel ...%s\n\n", fake ?
 	       "(fake run for tracing)" : "");
 	bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
 
-	cleanup_before_linux();
-
 	if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
 		r0 = 2;
 		r2 = (unsigned int)images->ft_addr;
@@ -83,11 +95,10 @@ static void boot_jump_linux(bootm_headers_t *images, int flag)
 		r2 = (unsigned int)env_get("bootargs");
 	}
 
-	if (!fake) {
-		smp_set_core_boot_addr((unsigned long)kernel_entry, -1);
-		smp_kick_all_cpus();
-		kernel_entry(r0, 0, r2);
-	}
+	cleanup_before_linux();
+
+	if (!fake)
+		board_jump_and_run(kernel_entry, r0, 0, r2);
 }
 
 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
@@ -96,17 +107,13 @@ int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
 	if ((flag & BOOTM_STATE_OS_BD_T) || (flag & BOOTM_STATE_OS_CMDLINE))
 		return -1;
 
-	if (flag & BOOTM_STATE_OS_PREP) {
-		boot_prep_linux(images);
-		return 0;
-	}
+	if (flag & BOOTM_STATE_OS_PREP)
+		return boot_prep_linux(images);
 
 	if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
 		boot_jump_linux(images, flag);
 		return 0;
 	}
 
-	boot_prep_linux(images);
-	boot_jump_linux(images, flag);
-	return 0;
+	return -1;
 }

board/synopsys/axs10x/axs10x.c

@@ -47,6 +47,18 @@ int board_early_init_f(void)
 }
 
 #ifdef CONFIG_ISA_ARCV2
+
+void board_jump_and_run(ulong entry, int zero, int arch, uint params)
+{
+	void (*kernel_entry)(int zero, int arch, uint params);
+
+	kernel_entry = (void (*)(int, int, uint))entry;
+
+	smp_set_core_boot_addr(entry, -1);
+	smp_kick_all_cpus();
+	kernel_entry(zero, arch, params);
+}
+
 #define RESET_VECTOR_ADDR	0x0
 
 void smp_set_core_boot_addr(unsigned long addr, int corenr)

board/synopsys/hsdk/hsdk.c

@@ -58,6 +58,17 @@ int board_mmc_init(bd_t *bis)
 	return 0;
 }
 
+void board_jump_and_run(ulong entry, int zero, int arch, uint params)
+{
+	void (*kernel_entry)(int zero, int arch, uint params);
+
+	kernel_entry = (void (*)(int, int, uint))entry;
+
+	smp_set_core_boot_addr(entry, -1);
+	smp_kick_all_cpus();
+	kernel_entry(zero, arch, params);
+}
+
 #define RESET_VECTOR_ADDR	0x0
 
 void smp_set_core_boot_addr(unsigned long addr, int corenr)