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soc/intel/common/block/p2sb: Add hpet BDF functions 

This allows to get/set the HPET bus device function.

Change-Id: I8d72da8bc392aa144d167d31cde30cc71cd1396e
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47531
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Arthur Heymans 2020-11-12 21:00:03 +01:00
parent a8798a3179
commit f629f7b78b
2 changed files with 31 additions and 0 deletions
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12
src/soc/intel/common/block/include/intelblocks/p2sb.h
View File

@ -29,6 +29,18 @@ void p2sb_disable_sideband_access(void);
void p2sb_enable_bar(void);
void p2sb_configure_hpet(void);
union p2sb_bdf {
struct {
uint16_t fn : 3;
uint16_t dev : 5;
uint16_t bus : 8;
};
uint16_t raw;
};
union p2sb_bdf p2sb_get_hpet_bdf(void);
void p2sb_set_hpet_bdf(union p2sb_bdf bdf);
/* SOC overrides */
/*
* Each SoC should implement EP Mask register to disable SB access

19
src/soc/intel/common/block/p2sb/p2sb.c
View File

@ -54,6 +54,25 @@ void p2sb_configure_hpet(void)
pci_write_config8(PCH_DEV_P2SB, HPTC_OFFSET, HPTC_ADDR_ENABLE_BIT);
}
union p2sb_bdf p2sb_get_hpet_bdf(void)
{
const bool was_hidden = p2sb_is_hidden();
if (was_hidden)
p2sb_unhide();
union p2sb_bdf bdf = { .raw = pci_read_config16(PCH_DEV_P2SB, PCH_P2SB_HBDF) };
if (was_hidden)
p2sb_hide();
return bdf;
}
void p2sb_set_hpet_bdf(union p2sb_bdf bdf)
{
pci_write_config16(PCH_DEV_P2SB, PCH_P2SB_HBDF, bdf.raw);
}
static void p2sb_set_hide_bit(int hide)
{
const uint16_t reg = PCH_P2SB_E0 + 1;