@@ -5,6 +5,7 @@
# SPDX-License-Identifier: GPL-2.0+
#
+obj-y += boot.o
obj-y += sdram_elpida.o
obj-y += hwinit.o
obj-y += emif.o
new file mode 100644
@@ -0,0 +1,60 @@
+/*
+ * OMAP4 boot
+ *
+ * Copyright (C) 2015 Paul Kocialkowski <contact@paulk.fr>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/omap_common.h>
+#include <spl.h>
+
+static u32 boot_devices[] = {
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_XIP,
+ BOOT_DEVICE_XIPWAIT,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_XIPWAIT,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_ONENAND,
+ BOOT_DEVICE_ONENAND,
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_ONENAND,
+ BOOT_DEVICE_XIPWAIT,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_ONENAND,
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_XIP,
+ BOOT_DEVICE_XIPWAIT,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_ONENAND,
+ BOOT_DEVICE_MMC2,
+ BOOT_DEVICE_XIP,
+ BOOT_DEVICE_MMC2_2,
+ BOOT_DEVICE_NAND,
+ BOOT_DEVICE_MMC2_2,
+ BOOT_DEVICE_MMC1,
+ BOOT_DEVICE_MMC2_2,
+ BOOT_DEVICE_MMC2_2,
+ BOOT_DEVICE_NONE,
+ BOOT_DEVICE_XIPWAIT,
+};
+
+u32 omap_sys_boot_device(void)
+{
+ u32 sys_boot;
+
+ /* Grab the first 5 bits of the status register for SYS_BOOT. */
+ sys_boot = readl((u32 *) (*ctrl)->control_status) & ((1 << 5) - 1);
+
+ if (sys_boot >= (sizeof(boot_devices) / sizeof(u32)))
+ return BOOT_DEVICE_NONE;
+
+ return boot_devices[sys_boot];
+}
@@ -279,6 +279,7 @@ struct prcm_regs const omap4_prcm = {
};
struct omap_sys_ctrl_regs const omap4_ctrl = {
+ .control_status = 0x4A0022C4,
.control_id_code = 0x4A002204,
.control_std_fuse_opp_bgap = 0x4a002260,
.control_status = 0x4a0022c4,
This introduces code to read the value of the SYS_BOOT pins on the OMAP4, as well as the memory-preferred scheme for the interpretation of each value. Signed-off-by: Paul Kocialkowski <contact@paulk.fr> --- arch/arm/cpu/armv7/omap4/Makefile | 1 + arch/arm/cpu/armv7/omap4/boot.c | 60 ++++++++++++++++++++++++++++++++++++ arch/arm/cpu/armv7/omap4/prcm-regs.c | 1 + 3 files changed, 62 insertions(+) create mode 100644 arch/arm/cpu/armv7/omap4/boot.c