From dfdea2aa40ab5bebea580601f6cef70bec25e177 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Tue, 1 Aug 2017 10:27:10 -0600 Subject: lib/cbmem: provide optional cbmem top initialization hook Provide a hook to allow an optional one-time cbmem_top() initialization. The new function, cbmem_top_init(), is called on the first expected initialization of cbmem based on the Kconfig options LATE_CBMEM_INIT and EARLY_CBMEM_INIT. Change-Id: I89edd2d11f226217c8e2aaca829b4f375a2cff28 Signed-off-by: Aaron Durbin Signed-off-by: John Zhao Reviewed-on: https://review.coreboot.org/20847 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/include/cbmem.h | 5 +++++ src/lib/imd_cbmem.c | 21 +++++++++++++++++++++ 2 files changed, 26 insertions(+) (limited to 'src') diff --git a/src/include/cbmem.h b/src/include/cbmem.h index b2d2a8be6c..007bc54b76 100644 --- a/src/include/cbmem.h +++ b/src/include/cbmem.h @@ -64,6 +64,11 @@ int cbmem_initialize_id_size(u32 id, u64 size); void cbmem_initialize_empty(void); void cbmem_initialize_empty_id_size(u32 id, u64 size); +/* Optional hook for platforms to initialize cbmem_top() value. When employed + * it's called a single time during boot at cbmem initialization/recovery + * time. */ +void cbmem_top_init(void); + /* Return the top address for dynamic cbmem. The address returned needs to * be consistent across romstage and ramstage, and it is required to be * below 4GiB. diff --git a/src/lib/imd_cbmem.c b/src/lib/imd_cbmem.c index ba00c2e9db..5713c2c328 100644 --- a/src/lib/imd_cbmem.c +++ b/src/lib/imd_cbmem.c @@ -109,12 +109,31 @@ void cbmem_initialize_empty(void) cbmem_initialize_empty_id_size(0, 0); } +void __attribute__((weak)) cbmem_top_init(void) +{ +} + +static void cbmem_top_init_once(void) +{ + /* Call one-time hook on expected cbmem init during boot. This sequence + assumes first init call is in romstage for early cbmem init and + ramstage for late cbmem init. */ + if (IS_ENABLED(CONFIG_EARLY_CBMEM_INIT) && !ENV_ROMSTAGE) + return; + if (IS_ENABLED(CONFIG_LATE_CBMEM_INIT) && !ENV_RAMSTAGE) + return; + + cbmem_top_init(); +} + void cbmem_initialize_empty_id_size(u32 id, u64 size) { struct imd *imd; struct imd imd_backing; const int no_recovery = 0; + cbmem_top_init_once(); + imd = imd_init_backing(&imd_backing); imd_handle_init(imd, cbmem_top()); @@ -145,6 +164,8 @@ int cbmem_initialize_id_size(u32 id, u64 size) struct imd imd_backing; const int recovery = 1; + cbmem_top_init_once(); + imd = imd_init_backing(&imd_backing); imd_handle_init(imd, cbmem_top()); -- cgit v1.2.3