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armv8: fsl-layerscape: Update parsing boot source

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Workaround of erratum A010539 clears the RCW source field in PORSR1
register, causing failure of detecting boot source using this method.
Use SMC call if U-Boot runs at EL2. If SMC is not implemented or
running at EL3, continue to read PORSR1 and presume QSPI as boot
source if erratum workaround A010539 is enabled and RCW source is
cleared.

Signed-off-by: York Sun <york.sun@nxp.com>
This commit is contained in:
York Sun 2018-11-05 18:02:09 +00:00
parent 5a73ec6169
commit 56db948b85
2 changed files with 24 additions and 5 deletions
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28
arch/arm/cpu/armv8/fsl-layerscape/cpu.c
View file

@ -693,23 +693,41 @@ enum boot_src __get_boot_src(u32 porsr1)
}
}
#endif
if (CONFIG_IS_ENABLED(SYS_FSL_ERRATUM_A010539) && !rcw_src)
src = BOOT_SOURCE_QSPI_NOR;
debug("%s: src 0x%x\n", __func__, src);
return src;
}
enum boot_src get_boot_src(void)
{
u32 porsr1;
struct pt_regs regs;
u32 porsr1 = 0;
#if defined(CONFIG_FSL_LSCH3)
u32 __iomem *dcfg_ccsr = (u32 __iomem *)DCFG_BASE;
porsr1 = in_le32(dcfg_ccsr + DCFG_PORSR1 / 4);
#elif defined(CONFIG_FSL_LSCH2)
struct ccsr_gur __iomem *gur = (void *)(CONFIG_SYS_FSL_GUTS_ADDR);
porsr1 = in_be32(&gur->porsr1);
#endif
if (current_el() == 2) {
regs.regs[0] = SIP_SVC_RCW;
smc_call(&regs);
if (!regs.regs[0])
porsr1 = regs.regs[1];
}
if (current_el() == 3 || !porsr1) {
#ifdef CONFIG_FSL_LSCH3
porsr1 = in_le32(dcfg_ccsr + DCFG_PORSR1 / 4);
#elif defined(CONFIG_FSL_LSCH2)
porsr1 = in_be32(&gur->porsr1);
#endif
}
debug("%s: porsr1 0x%x\n", __func__, porsr1);
return __get_boot_src(porsr1);

1
arch/arm/include/asm/arch-fsl-layerscape/soc.h
View file

@ -56,6 +56,7 @@ struct cpu_type {
#ifdef CONFIG_TFABOOT
#define SMC_DRAM_BANK_INFO (0xC200FF12)
#define SIP_SVC_RCW 0xC200FF18
phys_size_t tfa_get_dram_size(void);