[PATCH 01/11] imx: implement get_effective_memsize

[Peng Fan (OSS)]

From: Peng Fan <peng.fan at nxp.com>

To i.MX6/7 which has 2GB memory, the upper 4KB cut off, will cause the
top 1MB not mapped as normal memory, because ARMV7-A use section
mapping. So implement i.MX6/7 specific get_effective_memsize to fix the
issue.

Fixes: 777aaaa706bc("common/memsize.c: Fix get_effective_memsize() to check for overflow")
Signed-off-by: Peng Fan <peng.fan at nxp.com>
---
 arch/arm/mach-imx/cache.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/arch/arm/mach-imx/cache.c b/arch/arm/mach-imx/cache.c
index ab9b621a2a6..69a085abee7 100644
--- a/arch/arm/mach-imx/cache.c
+++ b/arch/arm/mach-imx/cache.c
@@ -7,10 +7,24 @@
 #include <cpu_func.h>
 #include <asm/armv7.h>
 #include <asm/cache.h>
+#include <asm/global_data.h>
 #include <asm/pl310.h>
 #include <asm/io.h>
 #include <asm/mach-imx/sys_proto.h>
 
+DECLARE_GLOBAL_DATA_PTR;
+
+phys_size_t get_effective_memsize(void)
+{
+#ifndef CONFIG_MAX_MEM_MAPPED
+	return gd->ram_size;
+#else
+	/* limit stack to what we can reasonable map */
+	return ((gd->ram_size > CONFIG_MAX_MEM_MAPPED) ?
+		CONFIG_MAX_MEM_MAPPED : gd->ram_size);
+#endif
+}
+
 void enable_ca7_smp(void)
 {
 	u32 val;
-- 
2.36.0