From: "Rao G" <grao.v80@gmail.com>
To: devel@edk2.groups.io
Subject: Read SPI BAR offset 0x10 throwing processor exception
Date: Fri, 28 Jan 2022 12:47:50 +0000 [thread overview]
Message-ID: <CAFz4ObH6Lz363izuGhhs5tfSJWZvBwuHvT_OXfyAG8H0MMYbKg@mail.gmail.com> (raw)
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Hi All,
Attempting to Read SPIBAR 0x10 from BUS 0 Dev 1F Func 5
>>
ScSpiBar0 = MmioRead32 (SpiInstance->PchSpiBase +
PCI_BASE_ADDRESSREG_OFFSET) & 0xFFFFF000;
>>
The above code is throwing exception
PchSpiBase at 0xC00FD000
!!!! X64 Exception Type - 0E(#PF - Page-Fault) CPU Apic ID - 00000000 !!!!
ExceptionData - 0000000000000000 I:0 R:0 U:0 W:0 P:0 PK:0 SS:0 SGX:0
RIP - 00000000771903D0, CS - 0000000000000038, RFLAGS - 0000000000010046
>From the shell the value at offset 0x10 is 0xFE010000
Any clues on why the processor is throwing exception while accessing the
value PchSpiBase+0x10 ?
Thanks
Ranga
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next reply other threads:[~2022-01-28 12:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-28 12:47 Rao G [this message]
2022-01-28 12:59 ` [edk2-devel] Read SPI BAR offset 0x10 throwing processor exception Michael Brown
2022-01-28 13:08 ` Rao G
2022-01-29 5:49 ` Jeff Fan
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