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ARM64: zynqmp: Fix secondary bootmode enabling

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Do not setup use_alt bit which copy alternative boot mode to
boot mode. The reason is that this bit is cleared after POR
but not after any software reset which will cause
that after SW reset bootrom will look for different boot image.

This patch setups alternative boot mode selection (purely SW
handling) and extends code to read this alternative boot mode first and
use it if it is setup.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Michal Simek 2016-10-25 11:43:02 +02:00
parent e1992276c3
commit 47359a0394
2 changed files with 7 additions and 2 deletions
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6
arch/arm/cpu/armv8/zynqmp/spl.c
View File

@ -69,12 +69,14 @@ u32 spl_boot_device(void)
#if defined(CONFIG_SPL_ZYNQMP_ALT_BOOTMODE_ENABLED)
/* Change default boot mode at run-time */
writel(BOOT_MODE_USE_ALT |
CONFIG_SPL_ZYNQMP_ALT_BOOTMODE << BOOT_MODE_ALT_SHIFT,
writel(CONFIG_SPL_ZYNQMP_ALT_BOOTMODE << BOOT_MODE_ALT_SHIFT,
&crlapb_base->boot_mode);
#endif
reg = readl(&crlapb_base->boot_mode);
if (reg >> BOOT_MODE_ALT_SHIFT)
reg >>= BOOT_MODE_ALT_SHIFT;
bootmode = reg & BOOT_MODES_MASK;
switch (bootmode) {

3
board/xilinx/zynqmp/zynqmp.c
View File

@ -335,6 +335,9 @@ int board_late_init(void)
}
reg = readl(&crlapb_base->boot_mode);
if (reg >> BOOT_MODE_ALT_SHIFT)
reg >>= BOOT_MODE_ALT_SHIFT;
bootmode = reg & BOOT_MODES_MASK;
puts("Bootmode: ");