cbfs: Pull handling of the CBFS_CACHE mem_pool into CBFS core

This patch pulls control of the memory pool serving allocations from the
CBFS_CACHE memlayout area into cbfs.c and makes it a core part of the
CBFS API. Previously, platforms would independently instantiate this as
part of boot_device_ro() (mostly through cbfs_spi.c). The new cbfs_cache
pool is exported as a global so these platforms can still use it to
directly back rdev_mmap() on their boot device, but the cbfs_cache can
now also use it to directly make allocations itself. This is used to
allow transparent decompression support in cbfs_map().

Signed-off-by: Julius Werner <jwerner@chromium.org>
Change-Id: I0d52b6a8f582a81a19fd0fd663bb89eab55a49d9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49333
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/src/soc/samsung/exynos5420/spi.c b/src/soc/samsung/exynos5420/spi.c
index 0a2f0275ac95..2fe9d5cf18b4 100644
--- a/src/soc/samsung/exynos5420/spi.c
+++ b/src/soc/samsung/exynos5420/spi.c
@@ -2,6 +2,7 @@
 
 #include <device/mmio.h>
 #include <assert.h>
+#include <cbfs.h>
 #include <console/console.h>
 #include <soc/cpu.h>
 #include <soc/spi.h>
@@ -268,13 +269,11 @@ static const struct region_device_ops exynos_spi_ops = {
 };
 
 static struct mmap_helper_region_device mdev =
-	MMAP_HELPER_REGION_INIT(&exynos_spi_ops, 0, CONFIG_ROM_SIZE);
+	MMAP_HELPER_DEV_INIT(&exynos_spi_ops, 0, CONFIG_ROM_SIZE, &cbfs_cache);
 
 void exynos_init_spi_boot_device(void)
 {
 	boot_slave = &exynos_spi_slaves[1];
-
-	mmap_helper_device_init(&mdev, _cbfs_cache, REGION_SIZE(cbfs_cache));
 }
 
 const struct region_device *exynos_spi_boot_device(void)