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authorNico Huber <nico.h@gmx.de>2018-05-26 17:47:42 +0200
committerNico Huber <nico.h@gmx.de>2018-05-31 15:08:48 +0000
commitb4953a93aa855afcf801d6f7d48df18f31ee2598 (patch)
tree169121e3fe449dca2a8707c510cf44434df9f28b
parentc51df93ccfefb1a5d1dd763d5b8f400c928593a0 (diff)
downloadcoreboot-b4953a93aa855afcf801d6f7d48df18f31ee2598.tar.xz
cpu/x86/mtrr: Get rid of CACHE_ROM_SIZE_OVERRIDE
As far as I can see this Kconfig option was used wrong ever since it was added. According to the commit message of 107f72e (Re-declare CACHE_ROM_SIZE as aligned ROM_SIZE for MTRR), it was only necessary to prevent overlapping with CAR. Let's handle the potential overlap in C macros instead and get rid of that option. Currently, it was only used by most FSP1.0 boards, and only because the `fsp1_0/Kconfig` set it to CBFS_SIZE (WTF?). Change-Id: I4d0096f14a9d343c2e646e48175fe2127198a822 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/26566 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
-rw-r--r--src/Kconfig4
-rw-r--r--src/drivers/intel/fsp1_0/Kconfig9
-rw-r--r--src/include/cpu/x86/mtrr.h47
-rw-r--r--src/mainboard/adi/rcc-dff/Kconfig4
-rw-r--r--src/mainboard/esd/atom15/Kconfig4
-rw-r--r--src/mainboard/intel/bayleybay_fsp/Kconfig4
-rw-r--r--src/mainboard/intel/camelbackmountain_fsp/Kconfig4
-rw-r--r--src/mainboard/intel/minnowmax/Kconfig4
-rw-r--r--src/mainboard/intel/mohonpeak/Kconfig4
-rw-r--r--src/mainboard/ocp/monolake/Kconfig4
-rw-r--r--src/mainboard/ocp/wedge100s/Kconfig4
-rw-r--r--src/mainboard/siemens/mc_bdx1/Kconfig4
-rw-r--r--src/mainboard/siemens/mc_tcu3/Kconfig4
13 files changed, 25 insertions, 75 deletions
diff --git a/src/Kconfig b/src/Kconfig
index d2b9fc23b6..4c1a0da708 100644
--- a/src/Kconfig
+++ b/src/Kconfig
@@ -516,10 +516,6 @@ config IOAPIC
bool
default n
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x0
-
config USE_WATCHDOG_ON_BOOT
bool
default n
diff --git a/src/drivers/intel/fsp1_0/Kconfig b/src/drivers/intel/fsp1_0/Kconfig
index 6aa89491e4..c7f6c18f86 100644
--- a/src/drivers/intel/fsp1_0/Kconfig
+++ b/src/drivers/intel/fsp1_0/Kconfig
@@ -103,15 +103,6 @@ config VIRTUAL_ROM_SIZE
the SPI ROMs are loaded with an 8 MB coreboot image, the virtual ROM
size is 16 MB.
-config CACHE_ROM_SIZE_OVERRIDE
- hex "Cache ROM Size"
- default CBFS_SIZE
- help
- This is the size of the cachable area that is passed into the FSP in
- the early initialization. Typically this should be the size of the CBFS
- area, but the size must be a power of 2 whereas the CBFS size does not
- have this limitation.
-
config USE_GENERIC_FSP_CAR_INC
bool
default n
diff --git a/src/include/cpu/x86/mtrr.h b/src/include/cpu/x86/mtrr.h
index 0d64be517e..f1e067a26b 100644
--- a/src/include/cpu/x86/mtrr.h
+++ b/src/include/cpu/x86/mtrr.h
@@ -118,12 +118,15 @@ static inline unsigned int fls(unsigned int x)
}
#endif /* !defined(__ASSEMBLER__) && !defined(__ROMCC__) */
-/* Align up to next power of 2, suitable for ROMCC and assembler too.
- * Range of result 256kB to 128MB is good enough here.
- */
+/* Align up/down to next power of 2, suitable for ROMCC and assembler
+ too. Range of result 256kB to 128MB is good enough here. */
#define _POW2_MASK(x) ((x>>1)|(x>>2)|(x>>3)|(x>>4)|(x>>5)| \
(x>>6)|(x>>7)|(x>>8)|((1<<18)-1))
#define _ALIGN_UP_POW2(x) ((x + _POW2_MASK(x)) & ~_POW2_MASK(x))
+#define _ALIGN_DOWN_POW2(x) ((x) & ~_POW2_MASK(x))
+
+/* Calculate `4GiB - x` (e.g. absolute address for offset from 4GiB) */
+#define _FROM_4G_TOP(x) (((1 << 20) - ((x) >> 12)) << 12)
/* At the end of romstage, low RAM 0..CACHE_TM_RAMTOP may be set
* as write-back cacheable to speed up ramstage decompression.
@@ -135,29 +138,29 @@ static inline unsigned int fls(unsigned int x)
# error "CONFIG_XIP_ROM_SIZE is not a power of 2"
#endif
-/* Select CACHE_ROM_SIZE to use with MTRR setup. For most cases this
- * resolves to a suitable CONFIG_ROM_SIZE but some odd cases need to
- * use CONFIG_CACHE_ROM_SIZE_OVERRIDE in the mainboard Kconfig.
- */
-#if (CONFIG_CACHE_ROM_SIZE_OVERRIDE != 0)
-# define CACHE_ROM_SIZE CONFIG_CACHE_ROM_SIZE_OVERRIDE
-#else
-# if ((CONFIG_ROM_SIZE & (CONFIG_ROM_SIZE-1)) == 0)
-# define CACHE_ROM_SIZE CONFIG_ROM_SIZE
-# else
-# define CACHE_ROM_SIZE _ALIGN_UP_POW2(CONFIG_ROM_SIZE)
-# if (CACHE_ROM_SIZE < CONFIG_ROM_SIZE) || (CACHE_ROM_SIZE >= \
- (2 * CONFIG_ROM_SIZE))
-# error "CACHE_ROM_SIZE is not optimal."
-# endif
-# endif
+/* For ROM caching, generally, try to use the next power of 2. */
+#define OPTIMAL_CACHE_ROM_SIZE _ALIGN_UP_POW2(CONFIG_ROM_SIZE)
+#define OPTIMAL_CACHE_ROM_BASE _FROM_4G_TOP(OPTIMAL_CACHE_ROM_SIZE)
+#if (OPTIMAL_CACHE_ROM_SIZE < CONFIG_ROM_SIZE) || \
+ (OPTIMAL_CACHE_ROM_SIZE >= (2 * CONFIG_ROM_SIZE))
+# error "Optimal CACHE_ROM_SIZE can't be derived, _POW2_MASK needs refinement."
#endif
-#if ((CACHE_ROM_SIZE & (CACHE_ROM_SIZE-1)) != 0)
-# error "CACHE_ROM_SIZE is not a power of 2."
+/* Make sure it doesn't overlap CAR, though. If the gap between
+ CAR and 4GiB is too small, make it at most the size of this
+ gap. As we can't align up (might overlap again), align down
+ to get a power of 2 again, for a single MTRR. */
+#define CAR_END (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE)
+#if CAR_END > OPTIMAL_CACHE_ROM_BASE
+# define CACHE_ROM_SIZE _ALIGN_DOWN_POW2(_FROM_4G_TOP(CAR_END))
+#else
+# define CACHE_ROM_SIZE OPTIMAL_CACHE_ROM_SIZE
+#endif
+#if ((CACHE_ROM_SIZE & (CACHE_ROM_SIZE - 1)) != 0)
+# error "CACHE_ROM_SIZE is not a power of 2, _POW2_MASK needs refinement."
#endif
-#define CACHE_ROM_BASE (((1<<20) - (CACHE_ROM_SIZE>>12))<<12)
+#define CACHE_ROM_BASE _FROM_4G_TOP(CACHE_ROM_SIZE)
#if (IS_ENABLED(CONFIG_SOC_SETS_MSRS) && !defined(__ASSEMBLER__) \
&& !defined(__ROMCC__))
diff --git a/src/mainboard/adi/rcc-dff/Kconfig b/src/mainboard/adi/rcc-dff/Kconfig
index b3559346b3..0673446bd3 100644
--- a/src/mainboard/adi/rcc-dff/Kconfig
+++ b/src/mainboard/adi/rcc-dff/Kconfig
@@ -37,10 +37,6 @@ config MAX_CPUS
int
default 16
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x800000
-
config FSP_FILE
string
default "../intel/fsp/rangeley/FvFsp.bin"
diff --git a/src/mainboard/esd/atom15/Kconfig b/src/mainboard/esd/atom15/Kconfig
index 814177e3e6..8568c5169a 100644
--- a/src/mainboard/esd/atom15/Kconfig
+++ b/src/mainboard/esd/atom15/Kconfig
@@ -36,10 +36,6 @@ config MAX_CPUS
int
default 16
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x800000
-
config FSP_FILE
string
default "../intel/fsp/baytrail/BAYTRAIL_FSP.fd"
diff --git a/src/mainboard/intel/bayleybay_fsp/Kconfig b/src/mainboard/intel/bayleybay_fsp/Kconfig
index e8318cb0f2..7f74342427 100644
--- a/src/mainboard/intel/bayleybay_fsp/Kconfig
+++ b/src/mainboard/intel/bayleybay_fsp/Kconfig
@@ -38,10 +38,6 @@ config MAX_CPUS
int
default 16
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x800000
-
config FSP_FILE
string
default "../intel/fsp/baytrail/BAYTRAIL_FSP_ECC.fd" if BOARD_INTEL_BAKERSPORT_FSP
diff --git a/src/mainboard/intel/camelbackmountain_fsp/Kconfig b/src/mainboard/intel/camelbackmountain_fsp/Kconfig
index 3d29e2e3c4..295091f889 100644
--- a/src/mainboard/intel/camelbackmountain_fsp/Kconfig
+++ b/src/mainboard/intel/camelbackmountain_fsp/Kconfig
@@ -23,10 +23,6 @@ config IRQ_SLOT_COUNT
int
default 18
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x800000
-
config CBFS_SIZE
hex
default 0x00200000
diff --git a/src/mainboard/intel/minnowmax/Kconfig b/src/mainboard/intel/minnowmax/Kconfig
index f0c4526f6a..4f7d25da0c 100644
--- a/src/mainboard/intel/minnowmax/Kconfig
+++ b/src/mainboard/intel/minnowmax/Kconfig
@@ -36,10 +36,6 @@ config MAX_CPUS
int
default 16
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x800000
-
config FSP_FILE
string
default "../intel/fsp/baytrail/BAYTRAIL_FSP.fd"
diff --git a/src/mainboard/intel/mohonpeak/Kconfig b/src/mainboard/intel/mohonpeak/Kconfig
index 207944e6c2..3a7538f3e8 100644
--- a/src/mainboard/intel/mohonpeak/Kconfig
+++ b/src/mainboard/intel/mohonpeak/Kconfig
@@ -37,10 +37,6 @@ config MAX_CPUS
int
default 16
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x800000
-
config FSP_FILE
string
default "../intel/fsp/rangeley/FvFsp.bin"
diff --git a/src/mainboard/ocp/monolake/Kconfig b/src/mainboard/ocp/monolake/Kconfig
index 2f253f0cee..09678c7053 100644
--- a/src/mainboard/ocp/monolake/Kconfig
+++ b/src/mainboard/ocp/monolake/Kconfig
@@ -23,10 +23,6 @@ config IRQ_SLOT_COUNT
int
default 18
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x800000
-
config CBFS_SIZE
hex
default 0x00200000
diff --git a/src/mainboard/ocp/wedge100s/Kconfig b/src/mainboard/ocp/wedge100s/Kconfig
index dfdc55222e..6a33edbc0d 100644
--- a/src/mainboard/ocp/wedge100s/Kconfig
+++ b/src/mainboard/ocp/wedge100s/Kconfig
@@ -24,10 +24,6 @@ config IRQ_SLOT_COUNT
int
default 18
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x800000
-
config CBFS_SIZE
hex
default 0x00200000
diff --git a/src/mainboard/siemens/mc_bdx1/Kconfig b/src/mainboard/siemens/mc_bdx1/Kconfig
index a24d09dc19..667a6ee688 100644
--- a/src/mainboard/siemens/mc_bdx1/Kconfig
+++ b/src/mainboard/siemens/mc_bdx1/Kconfig
@@ -27,10 +27,6 @@ config IRQ_SLOT_COUNT
int
default 18
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x1000000
-
config CBFS_SIZE
hex
default 0x00D00000
diff --git a/src/mainboard/siemens/mc_tcu3/Kconfig b/src/mainboard/siemens/mc_tcu3/Kconfig
index 6a3b3c4594..4be0060703 100644
--- a/src/mainboard/siemens/mc_tcu3/Kconfig
+++ b/src/mainboard/siemens/mc_tcu3/Kconfig
@@ -44,10 +44,6 @@ config MAX_CPUS
int
default 16
-config CACHE_ROM_SIZE_OVERRIDE
- hex
- default 0x1000000
-
config CBFS_SIZE
hex
default 0x00e00000