omap: add basic SPL support
- Provide alternate implementations of board_init_f()
board_init_r() for OMAP spl.
- Provide linker script
- Initialize global data
- Add serial console support
- Update CONFIG_SYS_TEXT_BASE to allow for SPL's bss and move
it to board config header from config.mk
Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/arch/arm/cpu/armv7/omap4/Makefile b/arch/arm/cpu/armv7/omap4/Makefile
index e1ccd68..e7ee0b8 100644
--- a/arch/arm/cpu/armv7/omap4/Makefile
+++ b/arch/arm/cpu/armv7/omap4/Makefile
@@ -30,9 +30,12 @@
COBJS += board.o
COBJS += clocks.o
COBJS += emif.o
-COBJS += mem.o
COBJS += sdram_elpida.o
+
+ifndef CONFIG_SPL_BUILD
+COBJS += mem.o
COBJS += sys_info.o
+endif
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS) $(SOBJS))
diff --git a/arch/arm/cpu/armv7/omap4/board.c b/arch/arm/cpu/armv7/omap4/board.c
index 786c239..54dd509 100644
--- a/arch/arm/cpu/armv7/omap4/board.c
+++ b/arch/arm/cpu/armv7/omap4/board.c
@@ -155,7 +155,14 @@
init_omap4_revision();
watchdog_init();
set_mux_conf_regs();
+#ifdef CONFIG_SPL_BUILD
+ preloader_console_init();
+#endif
prcm_init();
+#ifdef CONFIG_SPL_BUILD
+ /* For regular u-boot sdram_init() is called from dram_init() */
+ sdram_init();
+#endif
}
/*
diff --git a/arch/arm/cpu/armv7/omap4/clocks.c b/arch/arm/cpu/armv7/omap4/clocks.c
index e8d3a52..f1e233a 100644
--- a/arch/arm/cpu/armv7/omap4/clocks.c
+++ b/arch/arm/cpu/armv7/omap4/clocks.c
@@ -791,6 +791,39 @@
wait_for_lock(base);
}
+void setup_clocks_for_console(void)
+{
+ /* Do not add any spl_debug prints in this function */
+ clrsetbits_le32(&prcm->cm_l4per_clkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
+ CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
+ CD_CLKCTRL_CLKTRCTRL_SHIFT);
+
+ /* Enable all UARTs - console will be on one of them */
+ clrsetbits_le32(&prcm->cm_l4per_uart1_clkctrl,
+ MODULE_CLKCTRL_MODULEMODE_MASK,
+ MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+ MODULE_CLKCTRL_MODULEMODE_SHIFT);
+
+ clrsetbits_le32(&prcm->cm_l4per_uart2_clkctrl,
+ MODULE_CLKCTRL_MODULEMODE_MASK,
+ MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+ MODULE_CLKCTRL_MODULEMODE_SHIFT);
+
+ clrsetbits_le32(&prcm->cm_l4per_uart3_clkctrl,
+ MODULE_CLKCTRL_MODULEMODE_MASK,
+ MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+ MODULE_CLKCTRL_MODULEMODE_SHIFT);
+
+ clrsetbits_le32(&prcm->cm_l4per_uart3_clkctrl,
+ MODULE_CLKCTRL_MODULEMODE_MASK,
+ MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
+ MODULE_CLKCTRL_MODULEMODE_SHIFT);
+
+ clrsetbits_le32(&prcm->cm_l4per_clkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
+ CD_CLKCTRL_CLKTRCTRL_HW_AUTO <<
+ CD_CLKCTRL_CLKTRCTRL_SHIFT);
+}
+
void prcm_init(void)
{
switch (omap4_hw_init_context()) {