#include <boot_device.h>
#include <fmap.h>
#include <fmap_config.h>
#include <commonlib/helpers.h>
#include <commonlib/region.h>
#include <console/console.h>
#include <smmstore.h>
#include <types.h>

Include dependency graph for store.c:

Macros
#define	SMMSTORE_REGION "SMMSTORE"

Functions
	_Static_assert (IS_ALIGNED(FMAP_SECTION_SMMSTORE_START, SMM_BLOCK_SIZE), "SMMSTORE FMAP region not aligned to 64K")

	_Static_assert (SMM_BLOCK_SIZE<=FMAP_SECTION_SMMSTORE_SIZE, "SMMSTORE FMAP region must be at least 64K")

static enum cb_err	lookup_store_region (struct region *region)

static int	lookup_store (struct region_device *rstore)

int	smmstore_read_region (void buf, ssize_t bufsize)

static enum cb_err	scan_end (struct region_device *store)

int	smmstore_append_data (void key, uint32_t key_sz, void value, uint32_t value_sz)

int	smmstore_clear_region (void)

static int	smmstore_rdev_chain (struct region_device *rdev)

int	smmstore_init (void *buf, size_t len)
	Call once before using the store. More...

static int	lookup_block_in_store (struct region_device *store, uint32_t block_id)

static void *	mmap_com_buf (struct region_device *com_buf, uint32_t offset, uint32_t bufsize)

int	smmstore_rawread_region (uint32_t block_id, uint32_t offset, uint32_t bufsize)
	Reads the specified block of the SMMSTORE and places it in the communication buffer. More...

int	smmstore_rawwrite_region (uint32_t block_id, uint32_t offset, uint32_t bufsize)
	Writes the specified block of the SMMSTORE by reading it from the communication buffer. More...

int	smmstore_rawclear_region (uint32_t block_id)
	Erases the specified block of the SMMSTORE. More...

Variables
static bool	store_initialized

static struct region_device	mdev_com_buf

Macro Definition Documentation

◆ SMMSTORE_REGION

#define SMMSTORE_REGION "SMMSTORE"

Definition at line 12 of file store.c.

Function Documentation

◆ _Static_assert() [1/2]

_Static_assert	(	IS_ALIGNED(FMAP_SECTION_SMMSTORE_START, SMM_BLOCK_SIZE)	,
		"SMMSTORE FMAP region not aligned to 64K"
	)

◆ _Static_assert() [2/2]

_Static_assert	(	SMM_BLOCK_SIZE<=	FMAP_SECTION_SMMSTORE_SIZE,
		"SMMSTORE FMAP region must be at least 64K"
	)

◆ lookup_block_in_store()

static int lookup_block_in_store	(	struct region_device *	store,
		uint32_t	block_id
	)

static

Definition at line 326 of file store.c.

References BIOS_ERR, lookup_store(), printk, region_device_sz(), and SMM_BLOCK_SIZE.

Referenced by smmstore_rawclear_region(), smmstore_rawread_region(), and smmstore_rawwrite_region().

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◆ lookup_store()

static int lookup_store ( struct region_device * rstore )

static

Definition at line 67 of file store.c.

References boot_device_ro_subregion(), boot_device_rw_subregion(), CB_SUCCESS, incoherent_rdev_init(), lookup_store_region(), NULL, rdev, rdev_chain(), and region_device_sz().

Referenced by lookup_block_in_store(), scan_end(), smmstore_append_data(), and smmstore_clear_region().

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◆ lookup_store_region()

static enum cb_err lookup_store_region ( struct region * region )

static

Definition at line 18 of file store.c.

Referenced by lookup_store().

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◆ mmap_com_buf()

static void* mmap_com_buf	(	struct region_device *	com_buf,
		uint32_t	offset,
		uint32_t	bufsize
	)

static

Definition at line 342 of file store.c.

References BIOS_ERR, NULL, offset, printk, rdev_mmap(), region_device_sz(), and smmstore_rdev_chain().

Referenced by smmstore_rawread_region(), and smmstore_rawwrite_region().

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◆ scan_end()

static enum cb_err scan_end ( struct region_device * store )

static

Definition at line 97 of file store.c.

References BIOS_WARNING, buf, lookup_store(), MIN, NULL, printk, rdev_readat(), and region_device_sz().

Referenced by smmstore_append_data().

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◆ smmstore_append_data()

int smmstore_append_data	(	void *	key,
		uint32_t	key_sz,
		void *	value,
		uint32_t	value_sz
	)

Definition at line 179 of file store.c.

References BIOS_DEBUG, BIOS_WARNING, CB_SUCCESS, lookup_store(), offset, printk, rdev_chain(), rdev_writeat(), region_device_offset(), region_device_sz(), scan_end(), and value.

Referenced by smmstorev1_exec().

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◆ smmstore_clear_region()

int smmstore_clear_region ( void )

Definition at line 242 of file store.c.

References BIOS_WARNING, lookup_store(), printk, rdev_eraseat(), and region_device_sz().

Referenced by smmstorev1_exec().

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◆ smmstore_init()

int smmstore_init	(	void *	buf,
		size_t	len
	)

Call once before using the store.

In SMM this must be called through an APM SMI handler providing the communication buffer address and length.

Definition at line 278 of file store.c.

References buf, mdev_com_buf, rdev_chain_mem_rw(), SMM_BLOCK_SIZE, and store_initialized.

Referenced by smmstorev2_exec().

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◆ smmstore_rawclear_region()

int smmstore_rawclear_region ( uint32_t block_id )

Erases the specified block of the SMMSTORE.

The communication buffer remains untouched.

Parameters

block_id The id of the block to operate on

Returns: Returns -1 on error, 0 on success.

Definition at line 441 of file store.c.

References BIOS_ERR, lookup_block_in_store(), printk, rdev_eraseat(), and SMM_BLOCK_SIZE.

Referenced by smmstorev2_exec().

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◆ smmstore_rawread_region()

int smmstore_rawread_region	(	uint32_t	block_id,
		uint32_t	offset,
		uint32_t	bufsize
	)

Reads the specified block of the SMMSTORE and places it in the communication buffer.

Parameters

block_id	The id of the block to operate on
offset	Offset within the block. Must be smaller than the block size.
bufsize	Size of chunk to read within the block. Must be smaller than the block size.

Returns: Returns -1 on error, 0 on success.

Definition at line 372 of file store.c.

References BIOS_DEBUG, lookup_block_in_store(), mmap_com_buf(), offset, printk, rdev_munmap(), rdev_readat(), and SMM_BLOCK_SIZE.

Referenced by smmstorev2_exec().

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◆ smmstore_rawwrite_region()

int smmstore_rawwrite_region	(	uint32_t	block_id,
		uint32_t	offset,
		uint32_t	bufsize
	)

Writes the specified block of the SMMSTORE by reading it from the communication buffer.

Parameters

block_id	The id of the block to operate on
offset	Offset within the block. Must be smaller than the block size.
bufsize	Size of chunk to read within the block. Must be smaller than the block size.