Nicolas Pitre e45ca16ebc refactor(platforms): add generic hold pen ...

Introduce a common hold pen implementation for SMP secondary CPU
bring-up.  Each core has a cache-line-aligned hold_slot struct
whose 'entry' field holds HOLD_STATE_WAIT (all-ones sentinel)
while the core should keep polling, or the warm boot entrypoint
address when it should go.

plat_hold_pen_init() sets all slots to HOLD_STATE_WAIT and flushes
them to main memory.  This is called once during boot to
establish a known-good state, overwriting any stale cached data
left by earlier boot stages (e.g. a BL2 dcsw_op_all).

plat_hold_pen_signal() writes the entrypoint into the target slot,
flushes it, and issues SEV.

The plat_hold_pen_wait_and_jump assembly macro provides the
secondary CPU polling loop for both AArch64 and AArch32.

Change-Id: Id7322cb9e8caa6a750348d194b4db66e2a515623
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>

2026-03-25 10:50:46 -04:00

..

aarch32

refactor(bl32): flush before console switch state

2025-01-21 12:22:57 +01:00

aarch64

feat(cpufeat): enable FEAT_RAS for FEAT_STATE_CHECKED again

2026-01-19 10:50:58 +00:00

tbbr

Sanitise includes across codebase

2019-01-04 10:43:17 +00:00

plat_bl1_common.c

refactor(bl1): clean up bl2 layout calculation

2024-04-26 09:00:12 +00:00

plat_bl_common.c

feat(bl2): support RESET_TO_BL2 and ENABLE_RME

2026-01-27 16:38:53 +00:00

plat_gicv2_base.c

refactor: make arm_gicv2.c and arm_gicv3.c common

2025-04-17 07:05:26 +01:00

plat_gicv2.c

fix(platforms): typedef operands to match data type

2025-09-18 06:56:57 +00:00

plat_gicv3.c

fix(platforms): typedef operands to match data type

2025-09-18 06:56:57 +00:00

plat_gicv5.c

feat(gicv5): add a barebones GICv5 driver

2025-06-13 16:15:58 +01:00

plat_hold_pen.c

refactor(platforms): add generic hold pen

2026-03-25 10:50:46 -04:00

plat_log_common.c

Sanitise includes across codebase

2019-01-04 10:43:17 +00:00

plat_psci_common.c

fix(platforms): declare unused parameters as void

2025-08-05 16:32:22 +05:30

plat_spmd_manifest.c

feat(spmd): get spmc manifest from xferlist

2025-09-10 10:35:12 +01:00

ubsan.c

Add UBSAN support and handlers

2019-09-11 14:15:54 +01:00