soc/intel/common: Check bios_size and window_size after MIN operation
Clang Static Analyzer version 8.0.0 detects that log2_ceil(bios_size) and log2_ceil(window_size) are garbage or undefined if the value of bios_size and window_size is zero. Check bios_size and window_size after MIN operation to prevent error. TEST=Built and boot up to kernel. Change-Id: Ifc3f3da52d129ef5d6063a46b045603a236be759 Signed-off-by: John Zhao <john.zhao@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/32924 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
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@ -236,14 +236,13 @@ void fast_spi_cache_bios_region(void)
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/* Only the IFD BIOS region is memory mapped (at top of 4G) */
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fast_spi_get_bios_region(&bios_size);
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if (!bios_size)
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return;
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/* LOCAL APIC default address is 0xFEE0000, bios_size over 16MB will
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* cause memory type conflict when setting memory type to write
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* protection, so limit the cached bios region to be no more than 16MB.
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* */
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bios_size = MIN(bios_size, 16 * MiB);
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if (!bios_size)
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return;
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/* Round to power of two */
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alignment = 1UL << (log2_ceil(bios_size));
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@ -80,6 +80,9 @@ void lpc_open_pmio_window(uint16_t base, uint16_t size)
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/* Each IO range register can only open a 256-byte window. */
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window_size = MIN(size, LPC_LGIR_MAX_WINDOW_SIZE);
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if (!window_size)
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return;
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/* Window size must be a power of two for the AMASK to work. */
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alignment = 1UL << (log2_ceil(window_size));
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window_size = ALIGN_UP(window_size, alignment);
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