smn.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <amdblocks/smn.h>
#include <device/pci_ops.h>
#include <soc/pci_devs.h>
#include <types.h>
 
/* SMN registers accessed indirectly using an index/data pair in D0F00 config space */
#define SMN_INDEX_ADDR          0xb8 /* 32 bit */
#define SMN_DATA_ADDR           0xbc /* 32 bit */
 
uint32_t smn_read32(uint32_t reg)
{
        pci_write_config32(SOC_GNB_DEV, SMN_INDEX_ADDR, reg);
        return pci_read_config32(SOC_GNB_DEV, SMN_DATA_ADDR);
}
 
void smn_write32(uint32_t reg, uint32_t val)
{
        pci_write_config32(SOC_GNB_DEV, SMN_INDEX_ADDR, reg);
        pci_write_config32(SOC_GNB_DEV, SMN_DATA_ADDR, val);
}