[09/14] OMAP3: control/PRCM: add omap3_ctrl_write_boot_mode()

Commit Message

Paul Walmsley Dec. 7, 2010, 1:25 a.m. UTC

None

Patch

diff --git a/arch/arm/mach-omap2/control.c b/arch/arm/mach-omap2/control.c
index 1fa3294..9fda3d7 100644
--- a/arch/arm/mach-omap2/control.c
+++ b/arch/arm/mach-omap2/control.c
@@ -209,6 +209,37 @@  void omap4_ctrl_pad_writel(u32 val, u16 offset)
 	__raw_writel(val, OMAP4_CTRL_PAD_REGADDR(offset));
 }
 
+#ifdef CONFIG_ARCH_OMAP3
+
+/**
+ * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot
+ * @bootmode: 8-bit value to pass to some boot code
+ *
+ * Set the bootmode in the scratchpad RAM.  This is used after the
+ * system restarts.  Not sure what actually uses this - it may be the
+ * bootloader, rather than the boot ROM - contrary to the preserved
+ * comment below.  No return value.
+ */
+void omap3_ctrl_write_boot_mode(u8 bootmode)
+{
+	u32 l;
+
+	l = ('B' << 24) | ('M' << 16) | bootmode;
+
+	/*
+	 * Reserve the first word in scratchpad for communicating
+	 * with the boot ROM. A pointer to a data structure
+	 * describing the boot process can be stored there,
+	 * cf. OMAP34xx TRM, Initialization / Software Booting
+	 * Configuration.
+	 *
+	 * XXX This should use some omap_ctrl_writel()-type function
+	 */
+	__raw_writel(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4));
+}
+
+#endif
+
 #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
 /*
  * Clears the scratchpad contents in case of cold boot-
diff --git a/arch/arm/mach-omap2/control.h b/arch/arm/mach-omap2/control.h
index b6c6b7c..a9325ad 100644
--- a/arch/arm/mach-omap2/control.h
+++ b/arch/arm/mach-omap2/control.h
@@ -350,6 +350,7 @@  extern u32 *get_es3_restore_pointer(void);
 extern u32 omap3_arm_context[128];
 extern void omap3_control_save_context(void);
 extern void omap3_control_restore_context(void);
+extern void omap3_ctrl_write_boot_mode(u8 bootmode);
 
 #else
 #define omap_ctrl_base_get()		0
diff --git a/arch/arm/mach-omap2/prcm.c b/arch/arm/mach-omap2/prcm.c
index a51846e..2eca847 100644
--- a/arch/arm/mach-omap2/prcm.c
+++ b/arch/arm/mach-omap2/prcm.c
@@ -143,16 +143,8 @@  void omap_prcm_arch_reset(char mode, const char *cmd)
 
 		prcm_offs = WKUP_MOD;
 	} else if (cpu_is_omap34xx()) {
-		u32 l;
-
 		prcm_offs = OMAP3430_GR_MOD;
-		l = ('B' << 24) | ('M' << 16) | (cmd ? (u8)*cmd : 0);
-		/* Reserve the first word in scratchpad for communicating
-		 * with the boot ROM. A pointer to a data structure
-		 * describing the boot process can be stored there,
-		 * cf. OMAP34xx TRM, Initialization / Software Booting
-		 * Configuration. */
-		omap_writel(l, OMAP343X_SCRATCHPAD + 4);
+		omap3_ctrl_write_boot_mode((cmd ? (u8)*cmd : 0));
 	} else if (cpu_is_omap44xx())
 		prcm_offs = OMAP4430_PRM_DEVICE_MOD;
 	else