[RFC PATCH 1/4] meminfo: add memory details for armv8

[Ilias Apalodimas]

Upcoming patches are mapping memory with RO, RW^X etc permsissions.
Fix the meminfo command to display them properly

Signed-off-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>
---
 arch/arm/cpu/armv8/cache_v8.c    | 18 +++++++++++++++++-
 arch/arm/include/asm/armv8/mmu.h |  2 ++
 cmd/meminfo.c                    |  5 +++++
 3 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/arch/arm/cpu/armv8/cache_v8.c b/arch/arm/cpu/armv8/cache_v8.c
index 5d6953ffedd1..a4ca56c8ed42 100644
--- a/arch/arm/cpu/armv8/cache_v8.c
+++ b/arch/arm/cpu/armv8/cache_v8.c
@@ -421,7 +421,7 @@ static int count_ranges(void)
 	return count;
 }
 
-#define ALL_ATTRS (3 << 8 | PMD_ATTRINDX_MASK)
+#define ALL_ATTRS (3 << 8 | PMD_ATTRMASK)
 #define PTE_IS_TABLE(pte, level) (pte_type(&(pte)) == PTE_TYPE_TABLE && (level) < 3)
 
 enum walker_state {
@@ -568,6 +568,17 @@ static void pretty_print_table_attrs(u64 pte)
 static void pretty_print_block_attrs(u64 pte)
 {
 	u64 attrs = pte & PMD_ATTRINDX_MASK;
+	u64 perm_attrs = pte & PMD_ATTRMASK;
+
+	if ((perm_attrs & PTE_BLOCK_PXN) && (perm_attrs & PTE_BLOCK_UXN) &&
+	    perm_attrs & PTE_BLOCK_RO)
+		printf("%-5s", " | RO");
+	else if ((perm_attrs & PTE_BLOCK_PXN) && (perm_attrs & PTE_BLOCK_UXN))
+		printf("%-5s", " | RW");
+	else if (perm_attrs & PTE_BLOCK_RO)
+		printf("%-5s", " | RX");
+	else
+		printf("%-5s", " | RWX");
 
 	switch (attrs) {
 	case PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE):
@@ -1112,3 +1123,8 @@ void __weak enable_caches(void)
 	icache_enable();
 	dcache_enable();
 }
+
+void arch_dump_mem_attrs(void)
+{
+	dump_pagetable(gd->arch.tlb_addr, get_tcr(NULL, NULL));
+}
diff --git a/arch/arm/include/asm/armv8/mmu.h b/arch/arm/include/asm/armv8/mmu.h
index 0ab681c893d3..6af8cd111a44 100644
--- a/arch/arm/include/asm/armv8/mmu.h
+++ b/arch/arm/include/asm/armv8/mmu.h
@@ -66,6 +66,7 @@
 #define PTE_BLOCK_NG		(1 << 11)
 #define PTE_BLOCK_PXN		(UL(1) << 53)
 #define PTE_BLOCK_UXN		(UL(1) << 54)
+#define PTE_BLOCK_RO            (UL(1) << 7)
 
 /*
  * AttrIndx[2:0]
@@ -75,6 +76,7 @@
 #define PMD_ATTRMASK		(PTE_BLOCK_PXN		| \
 				 PTE_BLOCK_UXN		| \
 				 PMD_ATTRINDX_MASK	| \
+				 PTE_BLOCK_RO		| \
 				 PTE_TYPE_VALID)
 
 /*
diff --git a/cmd/meminfo.c b/cmd/meminfo.c
index 5e83d61c2dd3..3915e2bbb268 100644
--- a/cmd/meminfo.c
+++ b/cmd/meminfo.c
@@ -15,6 +15,10 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+void __weak arch_dump_mem_attrs(void)
+{
+}
+
 static void print_region(const char *name, ulong base, ulong size, ulong *uptop)
 {
 	ulong end = base + size;
@@ -54,6 +58,7 @@ static int do_meminfo(struct cmd_tbl *cmdtp, int flag, int argc,
 
 	puts("DRAM:  ");
 	print_size(gd->ram_size, "\n");
+	arch_dump_mem_attrs();
 
 	if (!IS_ENABLED(CONFIG_CMD_MEMINFO_MAP))
 		return 0;
-- 
2.43.0