soc_util.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <assert.h>
#include <device/device.h>
#include <device/pci.h>
#include <intelblocks/cpulib.h>
#include <soc/cpu.h>
#include <soc/pci_devs.h>
#include <soc/soc_util.h>
#include <soc/util.h>
 
const struct SystemMemoryMapHob *get_system_memory_map(void)
{
        size_t hob_size;
        const uint8_t mem_hob_guid[16] = FSP_SYSTEM_MEMORYMAP_HOB_GUID;
        const struct SystemMemoryMapHob **memmap_addr;
 
        memmap_addr = (const struct SystemMemoryMapHob **)
                fsp_find_extension_hob_by_guid(mem_hob_guid, &hob_size);
        /* hob_size is the size of the 8-byte address not the hob data */
        assert(memmap_addr != NULL && hob_size != 0);
        /* assert the pointer to the hob is not NULL */
        assert(*memmap_addr != NULL);
 
        return *memmap_addr;
}
 
bool is_iio_stack_res(const STACK_RES *res)
{
        return res->Personality == TYPE_UBOX_IIO;
}
 
uint32_t get_socket_stack_busno(uint32_t socket, uint32_t stack)
{
        const IIO_UDS *hob = get_iio_uds();
 
        assert(socket < hob->SystemStatus.numCpus && stack < MAX_LOGIC_IIO_STACK);
 
        return hob->PlatformData.IIO_resource[socket].StackRes[stack].BusBase;
}
 
/*
 * EX: CPX-SP
 * Ports    Stack   Stack(HOB)  IioConfigIou
 * ==========================================
 * 0        CSTACK      stack 0     IOU0
 * 1A..1D   PSTACKZ     stack 1     IOU1
 * 2A..2D   PSTACK1     stack 2     IOU2
 * 3A..3D   PSTACK2     stack 4     IOU3
 */
int soc_get_stack_for_port(int port)
{
        if (port == PORT_0)
                return CSTACK;
        else if (port >= PORT_1A && port <= PORT_1D)
                return PSTACK0;
        else if (port >= PORT_2A && port <= PORT_2D)
                return PSTACK1;
        else if (port >= PORT_3A && port <= PORT_3D)
                return PSTACK2;
        else
                return -1;
}
 
uint8_t soc_get_iio_ioapicid(int socket, int stack)
{
        uint8_t ioapic_id = socket ? 0xf : 0x9;
        switch (stack) {
        case CSTACK:
                break;
        case PSTACK0:
                ioapic_id += 1;
                break;
        case PSTACK1:
                ioapic_id += 2;
                break;
        case PSTACK2:
                ioapic_id += 3;
                break;
        default:
                return 0xff;
        }
        return ioapic_id;
}