On Monday 07 November 2022 16:00:06 Peng Fan (OSS) wrote:
From: Peng Fan peng.fan@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@nxp.com
Should not just configuring CONFIG_MAX_MEM_MAPPED properly avoid that issue?
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