tpm.c File Reference

#include <timer.h>
#include <console/console.h>
#include <device/mmio.h>
#include <string.h>
#include <soc/pci_devs.h>
#include <device/pci_ops.h>
#include "tpm.h"

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Data Structures
struct	control_area

Functions
static void	crb_readControlArea (void)
static int	crb_wait_for_reg32 (const void *addr, uint32_t timeoutMs, uint32_t mask, uint32_t expectedValue)
static int	crb_probe (void)
static uint8_t	crb_activate_locality (void)
static int	crb_switch_to_ready (void)
int	tpm2_init (void)
size_t	tpm2_process_command (const void *tpm2_command, size_t command_size, void *tpm2_response, size_t max_response)
void	tpm2_get_info (struct tpm2_info *tpm2_info)

Variables
static struct control_area	control_area
static uint8_t	cur_loc = 0

Function Documentation

crb_activate_locality()

static uint8_t crb_activate_locality ( void  )

static

Definition at line 111 of file tpm.c.

References BIOS_ERR, BIOS_SPEW, CRB_REG, CRB_REG_LOC_CTRL, CRB_REG_LOC_STATE, crb_wait_for_reg32(), LOC_CTRL_REQ_ACCESS, LOC_STATE_LOC_ASSIGN, LOC_STATE_REG_VALID_STS, printk, read8(), and write8().

Referenced by tpm2_process_command().

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crb_probe()

static int crb_probe ( void  )

static

Definition at line 83 of file tpm.c.

References BIOS_DEBUG, BIOS_SPEW, CRB_INTF_REG_CAP_CRB, CRB_INTF_REG_INTF_LOCK, CRB_INTF_REG_INTF_SEL, CRB_REG, CRB_REG_INTF_ID, cur_loc, printk, read64(), and write32().

Referenced by tpm2_init().

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crb_readControlArea()

static void crb_readControlArea ( void  )

static

Definition at line 39 of file tpm.c.

References control_area::cancel, control_area::command_bfr, control_area::command_size, CRB_REG, CRB_REG_CANCEL, CRB_REG_CMD_ADDR, CRB_REG_CMD_SIZE, CRB_REG_INT_CTRL, CRB_REG_REQUEST, CRB_REG_RESP_ADDR, CRB_REG_RESP_SIZE, CRB_REG_STATUS, cur_loc, control_area::interrupt_control, read32(), read64(), control_area::request, control_area::response_bfr, control_area::response_size, and control_area::status.

Referenced by tpm2_init().

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crb_switch_to_ready()

static int crb_switch_to_ready ( void  )

static

Definition at line 144 of file tpm.c.

References BIOS_ERR, CRB_REG, CRB_REG_REQUEST, CRB_REG_REQUEST_CMD_RDY, CRB_REG_STATUS, CRB_REG_STATUS_ERROR, crb_wait_for_reg32(), cur_loc, printk, and write8().

Referenced by tpm2_process_command().

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crb_wait_for_reg32()

static int crb_wait_for_reg32 ( const void *  addr, uint32_t  timeoutMs, uint32_t  mask, uint32_t  expectedValue  )

static

Definition at line 54 of file tpm.c.

References addr, BIOS_ERR, mask, printk, read32(), stopwatch_expired(), and stopwatch_init_msecs_expire().

Referenced by crb_activate_locality(), crb_switch_to_ready(), and tpm2_process_command().

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tpm2_get_info()

void tpm2_get_info

(

struct tpm2_info *

tpm2_info

)

Definition at line 266 of file tpm.c.

References CRB_REG, CRB_REG_INTF_ID, cur_loc, tpm2_info::device_id, read64(), tpm2_info::revision, and tpm2_info::vendor_id.

Referenced by tis_init().

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tpm2_init()

int tpm2_init

(

void

)

Definition at line 175 of file tpm.c.

References BIOS_ERR, BIOS_SPEW, crb_probe(), crb_readControlArea(), and printk.

Referenced by tis_init().

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tpm2_process_command()

size_t tpm2_process_command	(	const void *	tpm2_command,
		size_t	command_size,
		void *	tpm2_response,
		size_t	max_response
	)

Definition at line 195 of file tpm.c.

References BIOS_DEBUG, BIOS_ERR, control_area::command_bfr, control_area::command_size, crb_activate_locality(), CRB_REG, CRB_REG_START, CRB_REG_START_START, CRB_REG_STATUS, CRB_REG_STATUS_ERROR, crb_switch_to_ready(), crb_wait_for_reg32(), cur_loc, length, memcpy(), printk, read32(), control_area::response_bfr, control_area::response_size, and write8().

Referenced by tis_sendrecv().

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Variable Documentation

control_area

struct control_area control_area

static

cur_loc

uint8_t cur_loc = 0

static

Definition at line 36 of file tpm.c.

Referenced by crb_probe(), crb_readControlArea(), crb_switch_to_ready(), tpm2_get_info(), and tpm2_process_command().