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59 lines
1.9 KiB
59 lines
1.9 KiB
/*
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* Copyright (c) 2021, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef PCI_SVC_H
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#define PCI_SVC_H
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#include <lib/utils_def.h>
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/* SMCCC PCI platform functions */
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#define SMC_PCI_VERSION U(0x84000130)
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#define SMC_PCI_FEATURES U(0x84000131)
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#define SMC_PCI_READ U(0x84000132)
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#define SMC_PCI_WRITE U(0x84000133)
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#define SMC_PCI_SEG_INFO U(0x84000134)
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#define is_pci_fid(_fid) (((_fid) >= SMC_PCI_VERSION) && \
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((_fid) <= SMC_PCI_SEG_INFO))
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uint64_t pci_smc_handler(uint32_t smc_fid, u_register_t x1, u_register_t x2,
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u_register_t x3, u_register_t x4, void *cookie,
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void *handle, u_register_t flags);
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#define PCI_ADDR_FUN(dev) ((dev) & U(0x7))
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#define PCI_ADDR_DEV(dev) (((dev) >> U(3)) & U(0x001F))
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#define PCI_ADDR_BUS(dev) (((dev) >> U(8)) & U(0x00FF))
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#define PCI_ADDR_SEG(dev) (((dev) >> U(16)) & U(0xFFFF))
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#define PCI_OFFSET_MASK U(0xFFF)
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typedef union {
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struct {
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uint16_t minor;
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uint16_t major;
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} __packed;
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uint32_t val;
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} pcie_version;
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/*
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* platforms are responsible for providing implementations of these
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* three functions in a manner which conforms to the Arm PCI Configuration
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* Space Access Firmware Interface (DEN0115) and the PCIe specification's
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* sections on PCI configuration access. See the rpi4_pci_svc.c example.
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*/
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uint32_t pci_read_config(uint32_t addr, uint32_t off, uint32_t sz, uint32_t *val);
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uint32_t pci_write_config(uint32_t addr, uint32_t off, uint32_t sz, uint32_t val);
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uint32_t pci_get_bus_for_seg(uint32_t seg, uint32_t *bus_range, uint32_t *nseg);
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/* Return codes for Arm PCI Config Space Access Firmware SMC calls */
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#define SMC_PCI_CALL_SUCCESS U(0)
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#define SMC_PCI_CALL_NOT_SUPPORTED -1
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#define SMC_PCI_CALL_INVAL_PARAM -2
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#define SMC_PCI_CALL_NOT_IMPL -3
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#define SMC_PCI_SZ_8BIT U(1)
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#define SMC_PCI_SZ_16BIT U(2)
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#define SMC_PCI_SZ_32BIT U(4)
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#endif /* PCI_SVC_H */
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