coreboot-kgpe-d16/payloads/libpayload/include
Julius Werner db7f6fb752 Add buffer_to/from_fifo32(_prefix) helpers
Many peripheral drivers across different SoCs regularly face the same
task of piping a transfer buffer into (or reading it out of) a 32-bit
FIFO register. Sometimes it's just one register, sometimes a whole array
of registers. Sometimes you actually transfer 4 bytes per register
read/write, sometimes only 2 (or even 1). Sometimes writes need to be
prefixed with one or two command bytes which makes the actual payload
buffer "misaligned" in relation to the FIFO and requires a bunch of
tricky bit packing logic to get right. Most of the times transfer
lengths are not guaranteed to be divisible by 4, which also requires a
bunch of logic to treat the potential unaligned end of the transfer
correctly.

We have a dozen different implementations of this same pattern across
coreboot. This patch introduces a new family of helper functions that
aims to solve all these use cases once and for all (*fingers crossed*).

Change-Id: Ia71f66c1cee530afa4c77c46a838b4de646ffcfb
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34850
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2019-08-22 10:36:22 +00:00
..
arm/arch
arm64/arch libpayload: arm64: Make exception handling closer to arm32 2018-10-12 20:17:28 +00:00
arpa
mips/arch
pci
storage payloads: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX) 2019-03-07 17:15:30 +00:00
sys libpayload/sys/types.h: Add definition for off_t 2019-02-13 12:03:03 +00:00
udc
usb libpayload/usb: Increase USB request timeout to 5 s 2019-07-02 17:42:18 +00:00
x86/arch libpayload/apic: Only ACK interrupts triggered by the APIC 2018-10-04 15:24:20 +00:00
archive.h
assert.h
cbfs.h
cbfs_core.h libpayload: cbfs: Require input size and output size for cbfs_decompress 2019-02-28 13:56:26 +00:00
cbfs_ram.h tree: drop last paragraph of GPL copyright header 2015-10-31 21:37:39 +01:00
cbgfx.h
compiler.h Make common macros double-evaluation safe 2019-04-04 19:38:31 +00:00
coreboot_tables.h libpayload: cbgfx: Allow rotation of the display 2019-08-08 03:20:06 +00:00
ctype.h
die.h
endian.h payloads: Replace all IS_ENABLED(CONFIG_XXX) with CONFIG(XXX) 2019-03-07 17:15:30 +00:00
errno.h
exception.h libpayload/x86/exception: Add ability to handle user defined interrupts 2018-09-10 15:01:04 +00:00
fmap_serialized.h fmap: Add FMAP_AREA_PRESERVE 2019-03-04 13:25:01 +00:00
gdb.h libpayload: gdb: Factor out gdb_handle_reentrant_exception() from arm32 2018-10-12 20:17:40 +00:00
getopt.h
inttypes.h
ipchksum.h
kconfig.h Add new CONFIG(XXX) macro to replace IS_ENABLED(CONFIG_XXX) 2019-03-07 17:06:28 +00:00
keycodes.h
libpayload.h Add buffer_to/from_fifo32(_prefix) helpers 2019-08-22 10:36:22 +00:00
limits.h libpayload: limits.h: Provide reliable definitions for all XXX_MAX/MIN 2019-04-10 10:43:27 +00:00
lz4.h
lzma.h
malloc.h
multiboot_tables.h
panel.h
pci.h
queue.h payloads: Remove/fix trailing whitespace 2018-09-04 12:38:40 +00:00
stdarg.h
stddef.h libpayload/libc/time: Add an arch_ndelay() 2018-09-12 14:15:18 +00:00
stdint.h libpayload: Add ptrdiff_t typedef 2015-10-20 16:50:25 +02:00
stdio.h
stdlib.h libpayload: Deduplicate strtol and strtoull 2019-04-10 10:44:31 +00:00
string.h libpayload/libc: Tidy utf16le_to_ascii 2019-07-23 09:09:45 +00:00
strings.h
swab.h
sysinfo.h vboot: deprecate vboot_handoff structure 2019-07-23 12:07:07 +00:00
term.h
time.h
unistd.h
video_console.h Add coreboot framebuffer support to libpayload 2010-03-25 18:56:26 +00:00