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northbridge/amd/amdht: Add isochronous setup support

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The coherent fabric on all Family 10h/15h devices supports
isochronous mode, which is required for IOMMU operation.

Add initial support for isochronous operation.

Change-Id: Idd7c9b94a65f856b0059e1d45f8719d9475771b6
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/12042
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Timothy Pearson
2015-08-11 17:47:48 -05:00
committed by Martin Roth
parent 68130f506d
commit 50001b80f5
5 changed files with 129 additions and 4 deletions
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3
src/northbridge/amd/amdht/h3ffeat.h
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@@ -75,6 +75,7 @@
#define HTSLAVE_LINK01_OFFSET 4
#define HTSLAVE_LINK_CONTROL_0_REG 4
#define HTSLAVE_FREQ_REV_0_REG 0xC
#define HTSLAVE_FEATURE_CAP_REG 0x10
/* HT3 gen Capability */
#define IS_HT_GEN3_CAPABILITY(reg) \
@@ -122,10 +123,12 @@ typedef struct
u8 SelWidthIn;
u8 SelWidthOut;
u8 SelFrequency;
uint8_t enable_isochronous_mode;
/* This section is for keeping track of capabilities and possible configurations */
BOOL RegangCap;
uint32_t PrvFrequencyCap;
uint32_t PrvFeatureCap;
u8 PrvWidthInCap;
u8 PrvWidthOutCap;
uint32_t CompositeFrequencyCap;