arm: zynq: Add lowlevel initialization to C

Do lowlevel initialization directly in C. Zynq do not
require to do it in asm.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/cpu/armv7/zynq/cpu.c

@@ -21,9 +21,33 @@
  * MA 02111-1307 USA
  */
 #include <common.h>
+#include <asm/io.h>
 #include <asm/arch/sys_proto.h>
+#include <asm/arch/hardware.h>
 
-inline void lowlevel_init(void) {}
+void lowlevel_init(void)
+{
+	zynq_slcr_unlock();
+	/* remap DDR to zero, FILTERSTART */
+	writel(0, &scu_base->filter_start);
+
+	/* Device config APB, unlock the PCAP */
+	writel(0x757BDF0D, &devcfg_base->unlock);
+	writel(0xFFFFFFFF, &devcfg_base->rom_shadow);
+
+	/* OCM_CFG, Mask out the ROM, map ram into upper addresses */
+	writel(0x1F, &slcr_base->ocm_cfg);
+	/* FPGA_RST_CTRL, clear resets on AXI fabric ports */
+	writel(0x0, &slcr_base->fpga_rst_ctrl);
+	/* TZ_DDR_RAM, Set DDR trust zone non-secure */
+	writel(0xFFFFFFFF, &slcr_base->trust_zone);
+	/* Set urgent bits with register */
+	writel(0x0, &slcr_base->ddr_urgent_sel);
+	/* Urgent write, ports S2/S3 */
+	writel(0xC, &slcr_base->ddr_urgent);
+
+	zynq_slcr_lock();
+}
 
 void reset_cpu(ulong addr)
 {

arch/arm/include/asm/arch-zynq/hardware.h

@@ -24,6 +24,8 @@
 #define _ASM_ARCH_HARDWARE_H
 
 #define XPSS_SYS_CTRL_BASEADDR		0xF8000000
+#define XPSS_DEV_CFG_APB_BASEADDR	0xF8007000
+#define XPSS_SCU_BASEADDR		0xF8F00000
 
 /* Reflect slcr offsets */
 struct slcr_regs {
@@ -32,10 +34,52 @@ struct slcr_regs {
 	u32 slcr_unlock; /* 0x8 */
 	u32 reserved1[125];
 	u32 pss_rst_ctrl; /* 0x200 */
-	u32 reserved2[21];
+	u32 reserved2[15];
+	u32 fpga_rst_ctrl; /* 0x240 */
+	u32 reserved3[5];
 	u32 reboot_status; /* 0x258 */
+	u32 boot_mode; /* 0x25c */
+	u32 reserved4[116];
+	u32 trust_zone; /* 0x430 */ /* FIXME */
+	u32 reserved5[115];
+	u32 ddr_urgent; /* 0x600 */
+	u32 reserved6[6];
+	u32 ddr_urgent_sel; /* 0x61c */
+	u32 reserved7[188];
+	u32 ocm_cfg; /* 0x910 */
 };
 
 #define slcr_base ((struct slcr_regs *) XPSS_SYS_CTRL_BASEADDR)
 
+struct devcfg_regs {
+	u32 ctrl; /* 0x0 */
+	u32 lock; /* 0x4 */
+	u32 cfg; /* 0x8 */
+	u32 int_sts; /* 0xc */
+	u32 int_mask; /* 0x10 */
+	u32 status; /* 0x14 */
+	u32 dma_src_addr; /* 0x18 */
+	u32 dma_dst_addr; /* 0x1c */
+	u32 dma_src_len; /* 0x20 */
+	u32 dma_dst_len; /* 0x24 */
+	u32 rom_shadow; /* 0x28 */
+	u32 reserved1[2];
+	u32 unlock; /* 0x34 */
+	u32 reserved2[18];
+	u32 mctrl; /* 0x80 */
+	u32 reserved3;
+	u32 write_count; /* 0x88 */
+	u32 read_count; /* 0x8c */
+};
+
+#define devcfg_base ((struct devcfg_regs *) XPSS_DEV_CFG_APB_BASEADDR)
+
+struct scu_regs {
+	u32 reserved1[16];
+	u32 filter_start; /* 0x40 */
+	u32 filter_end; /* 0x44 */
+};
+
+#define scu_base ((struct scu_regs *) XPSS_SCU_BASEADDR)
+
 #endif /* _ASM_ARCH_HARDWARE_H */