cubieboard: Initialize memory in bootblock

Even though the Allwinner A10 is limited to a 24KiB bootblock, the
memory initialization takes only about 3KiB and leaves enough room for
an MMC or NAND driver, so init the memory early on. The advantage is
that we can eliminate complicated logistics of where to cache CBFS and
where to load the ramstage in SRAM.

Change-Id: Id549552ed509434e831db60deaef28e04d62417f
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/4630
Tested-by: build bot (Jenkins)
Reviewed-by: David Hendricks <dhendrix@chromium.org>

src/cpu/allwinner/a10/Makefile.inc

@@ -1,6 +1,8 @@
 bootblock-y	+= clock.c
+bootblock-y	+= raminit.c
 bootblock-y	+= gpio.c
 bootblock-y	+= pinmux.c
+bootblock-y	+= timer.c
 bootblock-y	+= bootblock_media.c
 bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart.c
 bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += uart_console.c

src/mainboard/cubietech/cubieboard/bootblock.c

@@ -9,8 +9,10 @@
 #include <arch/io.h>
 #include <uart.h>
 #include <console/console.h>
+#include <delay.h>
 #include <cpu/allwinner/a10/gpio.h>
 #include <cpu/allwinner/a10/clock.h>
+#include <cpu/allwinner/a10/dramc.h>
 
 #define CPU_AHB_APB0_DEFAULT 		\
 	 CPU_CLK_SRC_OSC24M	 	\
@@ -76,10 +78,50 @@ static void cubieboard_enable_uart(void)
 	a1x_periph_clock_enable(A1X_CLKEN_UART0);
 }
 
+static void cubieboard_raminit(void)
+{
+	struct dram_para dram_para = {
+		.clock = 480,
+		.type = 3,
+		.rank_num = 1,
+		.density = 4096,
+		.io_width = 16,
+		.bus_width = 32,
+		.cas = 6,
+		.zq = 123,
+		.odt_en = 0,
+		.size = 1024,
+		.tpr0 = 0x30926692,
+		.tpr1 = 0x1090,
+		.tpr2 = 0x1a0c8,
+		.tpr3 = 0,
+		.tpr4 = 0,
+		.tpr5 = 0,
+		.emr1 = 0,
+		.emr2 = 0,
+		.emr3 = 0,
+	};
+
+	dramc_init(&dram_para);
+
+	/* FIXME: ram_check does not compile for ARM,
+	 * and we didn't init console yet
+	 */
+	////void *const test_base = (void *)A1X_DRAM_BASE;
+	////ram_check((u32)test_base, (u32)test_base + 0x1000);
+}
+
 void bootblock_mainboard_init(void);
 void bootblock_mainboard_init(void)
 {
+	/* A10 Timer init uses the 24MHz clock, not PLLs, so we can init it very
+	 * early on to get udelay, which is used almost everywhere else.
+	 */
+	init_timer();
+
 	cubieboard_setup_clocks();
 	cubieboard_setup_gpios();
 	cubieboard_enable_uart();
+
+	cubieboard_raminit();
 }