On 8/4/22 10:15, Philip Oberfichtner wrote:
From: Marek Vasut marex@denx.de
Enable d-cache early in SPL right after DRAM is started up. This reduces U-Boot proper load time by 650ms when loaded from SPI NOR.
Signed-off-by: Marek Vasut marex@denx.de Signed-off-by: Philip Oberfichtner pro@denx.de
board/dhelectronics/dh_imx6/dh_imx6_spl.c | 27 +++++++++++++++++++++++ 1 file changed, 27 insertions(+)
diff --git a/board/dhelectronics/dh_imx6/dh_imx6_spl.c b/board/dhelectronics/dh_imx6/dh_imx6_spl.c index e49e97724a..2c0ddc527a 100644 --- a/board/dhelectronics/dh_imx6/dh_imx6_spl.c +++ b/board/dhelectronics/dh_imx6/dh_imx6_spl.c @@ -6,6 +6,7 @@ */
#include <common.h> +#include <cpu_func.h> #include <init.h> #include <asm/arch/clock.h> #include <asm/arch/crm_regs.h> @@ -14,11 +15,13 @@ #include <asm/arch/mx6-ddr.h> #include <asm/arch/mx6-pins.h> #include <asm/arch/sys_proto.h> +#include <asm/cache.h> #include <asm/gpio.h> #include <asm/mach-imx/boot_mode.h> #include <asm/mach-imx/iomux-v3.h> #include <asm/mach-imx/mxc_i2c.h> #include <asm/io.h> +#include <asm/system.h> #include <errno.h> #include <fuse.h> #include <fsl_esdhc_imx.h> @@ -610,6 +613,20 @@ static void dhcom_spl_dram_init(void) } }
+void dram_bank_mmu_setup(int bank) +{
- int i;
- set_section_dcache(ROMCP_ARB_BASE_ADDR >> MMU_SECTION_SHIFT, DCACHE_DEFAULT_OPTION);
- set_section_dcache(IRAM_BASE_ADDR >> MMU_SECTION_SHIFT, DCACHE_DEFAULT_OPTION);
- for (i = MMDC0_ARB_BASE_ADDR >> MMU_SECTION_SHIFT;
i < ((MMDC0_ARB_BASE_ADDR >> MMU_SECTION_SHIFT) +(SZ_1G >> MMU_SECTION_SHIFT));i++)set_section_dcache(i, DCACHE_DEFAULT_OPTION);+}
- void board_init_f(ulong dummy) { /* setup AIPS and disable watchdog */
@@ -636,9 +653,19 @@ void board_init_f(ulong dummy) /* DDR3 initialization */ dhcom_spl_dram_init();
/* Set up early MMU tables at the beginning of DRAM and start d-cache */
gd->arch.tlb_addr = MMDC0_ARB_BASE_ADDR + SZ_32M;
gd->arch.tlb_size = PGTABLE_SIZE;
enable_caches();
/* Clear the BSS. */ memset(__bss_start, 0, __bss_end - __bss_start);
/* load/boot image from boot device */ board_init_r(NULL, 0); }
+void spl_board_prepare_for_boot(void) +{
An explanation why this is needed in a comment would be good to have.
- dcache_disable();
+}