[PATCH 1/1] sandbox: make RAM size configurable

[Heinrich Schuchardt]

Up to now the RAM size of the sandbox is hard coded as 128 MiB. This does
not allow testing the correct handling of addresses outside the 32bit
range. 128 MiB is also rather small when tracing functions where the trace
is written to RAM.

Provide configuration variable CONFIG_SANDBOX_RAM_SIZE_MB to set the RAM
size in MiB. It defaults to 128 MiB with a minimum of 64 MiB.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 arch/sandbox/Kconfig             | 10 ++++++++++
 arch/sandbox/include/asm/state.h |  2 +-
 include/configs/sandbox.h        |  5 ++++-
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/arch/sandbox/Kconfig b/arch/sandbox/Kconfig
index 2a08533c4b..65f988e736 100644
--- a/arch/sandbox/Kconfig
+++ b/arch/sandbox/Kconfig
@@ -15,6 +15,16 @@ config SANDBOX64
 	select PHYS_64BIT
 	select HOST_64BIT

+config SANDBOX_RAM_SIZE_MB
+	int "RAM size in MiB"
+	default 128
+	range 64 4095 if !SANDBOX64
+	range 64 268435456 if SANDBOX64
+	help
+	  Memory size of the sandbox in MiB. The default value is 128 MiB.
+	  The minimum value is 64 MiB. The maximum value is 4095 MiB for the
+	  32bit sandbox.
+
 config SANDBOX_SPL
 	bool "Enable SPL for sandbox"
 	select SUPPORT_SPL
diff --git a/arch/sandbox/include/asm/state.h b/arch/sandbox/include/asm/state.h
index 705645d714..1bfad305f1 100644
--- a/arch/sandbox/include/asm/state.h
+++ b/arch/sandbox/include/asm/state.h
@@ -73,7 +73,7 @@ struct sandbox_state {
 	char **argv;			/* Command line arguments */
 	const char *jumped_fname;	/* Jumped from previous U_Boot */
 	uint8_t *ram_buf;		/* Emulated RAM buffer */
-	unsigned int ram_size;		/* Size of RAM buffer */
+	unsigned long ram_size;		/* Size of RAM buffer */
 	const char *ram_buf_fname;	/* Filename to use for RAM buffer */
 	bool ram_buf_rm;		/* Remove RAM buffer file after read */
 	bool write_ram_buf;		/* Write RAM buffer on exit */
diff --git a/include/configs/sandbox.h b/include/configs/sandbox.h
index 2a81f3a9bc..3d46ee0d46 100644
--- a/include/configs/sandbox.h
+++ b/include/configs/sandbox.h
@@ -47,8 +47,11 @@
 #define CONFIG_PHYSMEM

 /* Size of our emulated memory */
+#define SB_CONCAT(x, y) x ## y
+#define SB_TO_UL(s) SB_CONCAT(s, UL)
 #define CONFIG_SYS_SDRAM_BASE		0
-#define CONFIG_SYS_SDRAM_SIZE		(128 << 20)
+#define CONFIG_SYS_SDRAM_SIZE \
+		(SB_TO_UL(CONFIG_SANDBOX_RAM_SIZE_MB) << 20)
 #define CONFIG_SYS_MONITOR_BASE	0

 #define CONFIG_SYS_BAUDRATE_TABLE	{4800, 9600, 19200, 38400, 57600,\
--
2.26.2