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authorNico Huber <nico.huber@secunet.com>2012-08-30 15:36:57 +0200
committerPeter Stuge <peter@stuge.se>2012-10-27 02:52:58 +0200
commit1f6bd94fa8e683f83887f6847295d45a4d4f3731 (patch)
treead4f31ed218d5512f741745537951d61a3f46689 /payloads/libpayload/include/strings.h
parent7baadac40364cdbf20c2add19f2aac678d3b603a (diff)
libpayload: New AHCI, ATA and ATAPI drivers
This adds a new interface for storage devices. A driver for ATA and ATAPI drives on AHCI host controllers comes along. The interface is very simple and was designed to match FILO's needs. It consists of three functions: void storage_initialize(void); Initializes controllers. Should be called once at startup. storage_poll_t storage_probe(size_t dev_num); with typedef enum { POLL_NO_DEVICE = -2, POLL_ERROR = -1, POLL_NO_MEDIUM = 0, POLL_MEDIUM_PRESENT = 1, } storage_poll_t; Looks for a drive with number dev_num (drives are counted from zero) and polls for a medium in the drive if appropriate. int storage_read_blocks512(size_t dev_num, u64 start, size_t count, unsigned char *buf); Reads count blocks of 512 bytes from block start of drive dev_num into buf. Change-Id: I1c85796b7f8e379ff3817a61b1837636b57e182b Signed-off-by: Nico Huber <nico.huber@secunet.com> Reviewed-on: http://review.coreboot.org/1622 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org> Reviewed-by: Peter Stuge <peter@stuge.se>
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