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authorJulius Werner <jwerner@chromium.org>2014-08-20 15:29:56 -0700
committerPatrick Georgi <pgeorgi@google.com>2015-04-06 22:05:01 +0200
commitec5e5e0db2ac923a4f80d24ffa7582c3b821d971 (patch)
treea9d8c7d6a0fab0cc2c41c9de4ec39f355289a72b /src/mainboard/google/nyan_blaze
parent06ef04604570d402687245521731053c66888b15 (diff)
downloadcoreboot-ec5e5e0db2ac923a4f80d24ffa7582c3b821d971.tar.xz
New mechanism to define SRAM/memory map with automatic bounds checking
This patch creates a new mechanism to define the static memory layout (primarily in SRAM) for a given board, superseding the brittle mass of Kconfigs that we were using before. The core part is a memlayout.ld file in the mainboard directory (although boards are expected to just include the SoC default in most cases), which is the primary linker script for all stages (though not rmodules for now). It uses preprocessor macros from <memlayout.h> to form a different valid linker script for all stages while looking like a declarative, boilerplate-free map of memory addresses to the programmer. Linker asserts will automatically guarantee that the defined regions cannot overlap. Stages are defined with a maximum size that will be enforced by the linker. The file serves to both define and document the memory layout, so that the documentation cannot go missing or out of date. The mechanism is implemented for all boards in the ARM, ARM64 and MIPS architectures, and should be extended onto all systems using SRAM in the future. The CAR/XIP environment on x86 has very different requirements and the layout is generally not as static, so it will stay like it is and be unaffected by this patch (save for aligning some symbol names for consistency and sharing the new common ramstage linker script include). BUG=None TEST=Booted normally and in recovery mode, checked suspend/resume and the CBMEM console on Falco, Blaze (both normal and vboot2), Pinky and Pit. Compiled Ryu, Storm and Urara, manually compared the disassemblies with ToT and looked for red flags. Change-Id: Ifd2276417f2036cbe9c056f17e42f051bcd20e81 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: f1e2028e7ebceeb2d71ff366150a37564595e614 Original-Change-Id: I005506add4e8fcdb74db6d5e6cb2d4cb1bd3cda5 Original-Signed-off-by: Julius Werner <jwerner@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/213370 Reviewed-on: http://review.coreboot.org/9283 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Tauner <stefan.tauner@gmx.at> Reviewed-by: Aaron Durbin <adurbin@google.com>
Diffstat (limited to 'src/mainboard/google/nyan_blaze')
-rw-r--r--src/mainboard/google/nyan_blaze/Kconfig8
-rw-r--r--src/mainboard/google/nyan_blaze/Makefile.inc5
-rw-r--r--src/mainboard/google/nyan_blaze/mainboard.c5
-rw-r--r--src/mainboard/google/nyan_blaze/memlayout.ld1
-rw-r--r--src/mainboard/google/nyan_blaze/romstage.c24
5 files changed, 22 insertions, 21 deletions
diff --git a/src/mainboard/google/nyan_blaze/Kconfig b/src/mainboard/google/nyan_blaze/Kconfig
index 5938e7ee1c..34959199b3 100644
--- a/src/mainboard/google/nyan_blaze/Kconfig
+++ b/src/mainboard/google/nyan_blaze/Kconfig
@@ -45,14 +45,6 @@ config MAINBOARD_PART_NUMBER
string
default "Nyan Blaze"
-config DRAM_DMA_START
- hex
- default 0x90000000
-
-config DRAM_DMA_SIZE
- hex
- default 0x00200000
-
choice
prompt "BCT boot media"
default NYAN_BLAZE_BCT_CFG_SPI
diff --git a/src/mainboard/google/nyan_blaze/Makefile.inc b/src/mainboard/google/nyan_blaze/Makefile.inc
index dc998d1c2d..343040994c 100644
--- a/src/mainboard/google/nyan_blaze/Makefile.inc
+++ b/src/mainboard/google/nyan_blaze/Makefile.inc
@@ -45,3 +45,8 @@ ramstage-y += reset.c
ramstage-y += boardid.c
ramstage-y += mainboard.c
ramstage-$(CONFIG_CHROMEOS) += chromeos.c
+
+bootblock-y += memlayout.ld
+verstage-y += memlayout.ld
+romstage-y += memlayout.ld
+ramstage-y += memlayout.ld
diff --git a/src/mainboard/google/nyan_blaze/mainboard.c b/src/mainboard/google/nyan_blaze/mainboard.c
index ccbaf63f94..5f1cb49ceb 100644
--- a/src/mainboard/google/nyan_blaze/mainboard.c
+++ b/src/mainboard/google/nyan_blaze/mainboard.c
@@ -30,6 +30,7 @@
#include <soc/nvidia/tegra124/pmc.h>
#include <soc/nvidia/tegra124/spi.h>
#include <soc/nvidia/tegra/usb.h>
+#include <symbols.h>
#include <vendorcode/google/chromeos/chromeos.h>
static struct clk_rst_ctlr *clk_rst = (void *)TEGRA_CLK_RST_BASE;
@@ -266,6 +267,6 @@ void lb_board(struct lb_header *header)
dma = (struct lb_range *)lb_new_record(header);
dma->tag = LB_TAB_DMA;
dma->size = sizeof(*dma);
- dma->range_start = CONFIG_DRAM_DMA_START;
- dma->range_size = CONFIG_DRAM_DMA_SIZE;
+ dma->range_start = (uintptr_t)_dma_coherent;
+ dma->range_size = _dma_coherent_size;
}
diff --git a/src/mainboard/google/nyan_blaze/memlayout.ld b/src/mainboard/google/nyan_blaze/memlayout.ld
new file mode 100644
index 0000000000..33ce6446ad
--- /dev/null
+++ b/src/mainboard/google/nyan_blaze/memlayout.ld
@@ -0,0 +1 @@
+#include <soc/nvidia/tegra124/memlayout.ld>
diff --git a/src/mainboard/google/nyan_blaze/romstage.c b/src/mainboard/google/nyan_blaze/romstage.c
index fca705df03..fb1b9e2b77 100644
--- a/src/mainboard/google/nyan_blaze/romstage.c
+++ b/src/mainboard/google/nyan_blaze/romstage.c
@@ -39,6 +39,7 @@
#include <soc/addressmap.h>
#include <soc/clock.h>
#include <soc/display.h>
+#include <symbols.h>
#include <timestamp.h>
static void __attribute__((noinline)) romstage(void)
@@ -52,29 +53,30 @@ static void __attribute__((noinline)) romstage(void)
sdram_init(get_sdram_config());
/* used for MMU and CBMEM setup, in MB */
- u32 dram_start = (CONFIG_SYS_SDRAM_BASE >> 20);
- u32 dram_end = sdram_max_addressable_mb(); /* plus one... */
- u32 dram_size = dram_end - dram_start;
+ u32 dram_start_mb = (uintptr_t)_dram/MiB;
+ u32 dram_end_mb = sdram_max_addressable_mb();
+ u32 dram_size_mb = dram_end_mb - dram_start_mb;
#if !CONFIG_VBOOT2_VERIFY_FIRMWARE
configure_l2_cache();
mmu_init();
/* Device memory below DRAM is uncached. */
- mmu_config_range(0, dram_start, DCACHE_OFF);
- /* SRAM is cached. Round the size up to 2MB, the LPAE page size. */
- mmu_config_range(0x40000000 >> 20, 2, DCACHE_WRITEBACK);
+ mmu_config_range(0, dram_start_mb, DCACHE_OFF);
+ /* SRAM is cached. MMU code will round size up to page size. */
+ mmu_config_range((uintptr_t)_sram/MiB, div_round_up(_sram_size, MiB),
+ DCACHE_WRITEBACK);
/* The space above DRAM is uncached. */
- if (dram_end < 4096)
- mmu_config_range(dram_end, 4096 - dram_end, DCACHE_OFF);
+ if (dram_end_mb < 4096)
+ mmu_config_range(dram_end_mb, 4096 - dram_end_mb, DCACHE_OFF);
mmu_disable_range(0, 1);
dcache_mmu_enable();
#endif
/* DRAM is cached. */
- mmu_config_range(dram_start, dram_size, DCACHE_WRITEBACK);
+ mmu_config_range(dram_start_mb, dram_size_mb, DCACHE_WRITEBACK);
/* A window for DMA is uncached. */
- mmu_config_range(CONFIG_DRAM_DMA_START >> 20,
- CONFIG_DRAM_DMA_SIZE >> 20, DCACHE_OFF);
+ mmu_config_range((uintptr_t)_dma_coherent/MiB,
+ _dma_coherent_size/MiB, DCACHE_OFF);
/*
* A watchdog reset only resets part of the system so it ends up in