[U-Boot] [PATCH 3/3] arm: zynq: Add lowlevel initialization to C

[Albert ARIBAUD <albert.u.boot@aribaud.net>]

Hi Michal,

On Mon,  4 Feb 2013 15:36:07 +0100, Michal Simek
<michal.simek@xilinx.com> wrote:

> 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             |   26 +++++++++++++++-
>  arch/arm/include/asm/arch-zynq/hardware.h |   46 ++++++++++++++++++++++++++++-
>  2 files changed, 70 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/cpu/armv7/zynq/cpu.c b/arch/arm/cpu/armv7/zynq/cpu.c
> index 91618d3..e8f4c19 100644
> --- a/arch/arm/cpu/armv7/zynq/cpu.c
> +++ b/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)
>  {
> diff --git a/arch/arm/include/asm/arch-zynq/hardware.h b/arch/arm/include/asm/arch-zynq/hardware.h
> index ad17b27..d0c69da 100644
> --- a/arch/arm/include/asm/arch-zynq/hardware.h
> +++ b/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 */

Applied to u-boot-arm/master via microblaze/mainline/arm, thanks!

Amicalement,
-- 
Albert.