lib: utils: Update fdt_reserved_memory_fixup() to use current domain

Now that each HART is mapped to a domain having a set of memory
regions, we update fdt_reserved_memory_fixup() to use domain memory
regions for adding reserved memory nodes in device tree.

We also change reserved memory node name prefix from "mmode_pmp"
to "mmode_resv" because domain memory regions can impact other
hardware configurations (such as IOPMP, etc) along with PMP.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>

1 files changed, 22 insertions, 25 deletions

diff --git a/lib/utils/fdt/fdt_fixup.c b/lib/utils/fdt/fdt_fixup.c
index 8f554e1..e9e1dff 100644
--- a/lib/utils/fdt/fdt_fixup.c
+++ b/lib/utils/fdt/fdt_fixup.c
@@ -9,6 +9,7 @@
 
 #include <libfdt.h>
 #include <sbi/sbi_console.h>
+#include <sbi/sbi_domain.h>
 #include <sbi/sbi_math.h>
 #include <sbi/sbi_hart.h>
 #include <sbi/sbi_platform.h>
@@ -97,11 +98,11 @@ static int fdt_resv_memory_update_node(void *fdt, unsigned long addr,
 
 	if (na > 1 && addr_high)
 		sbi_snprintf(name, sizeof(name),
-			     "mmode_pmp%d@%x,%x", index,
+			     "mmode_resv%d@%x,%x", index,
 			     addr_high, addr_low);
 	else
 		sbi_snprintf(name, sizeof(name),
-			     "mmode_pmp%d@%x", index,
+			     "mmode_resv%d@%x", index,
 			     addr_low);
 
 	subnode = fdt_add_subnode(fdt, parent, name);
@@ -153,10 +154,11 @@ static int fdt_resv_memory_update_node(void *fdt, unsigned long addr,
  */
 int fdt_reserved_memory_fixup(void *fdt)
 {
+	struct sbi_domain_memregion *reg;
+	struct sbi_domain *dom = sbi_domain_thishart_ptr();
 	struct sbi_scratch *scratch = sbi_scratch_thishart_ptr();
-	unsigned long prot, addr, size;
-	int parent, i, j;
-	int err;
+	unsigned long addr, size;
+	int err, parent, i;
 	int na = fdt_address_cells(fdt, 0);
 	int ns = fdt_size_cells(fdt, 0);
 
@@ -203,34 +205,29 @@ int fdt_reserved_memory_fixup(void *fdt)
 	 * We assume the given device tree does not contain any memory region
 	 * child node protected by PMP. Normally PMP programming happens at
 	 * M-mode firmware. The memory space used by OpenSBI is protected.
-	 * Some additional memory spaces may be protected by platform codes.
+	 * Some additional memory spaces may be protected by domain memory
+	 * regions.
 	 *
 	 * With above assumption, we create child nodes directly.
 	 */
 
-	if (!sbi_hart_pmp_count(scratch)) {
-		/*
-		 * Update the DT with firmware start & size even if PMP is not
-		 * supported. This makes sure that supervisor OS is always
-		 * aware of OpenSBI resident memory area.
-		 */
-		addr = scratch->fw_start & ~(scratch->fw_size - 1UL);
-		size = (1UL << log2roundup(scratch->fw_size));
-		return fdt_resv_memory_update_node(fdt, addr, size,
-						   0, parent, true);
-	}
-
-	for (i = 0, j = 0; i < sbi_hart_pmp_count(scratch); i++) {
-		err = sbi_hart_pmp_get(scratch, i, &prot, &addr, &size);
-		if (err)
+	i = 0;
+	sbi_domain_for_each_memregion(dom, reg) {
+		/* Ignore MMIO or READABLE or WRITABLE or EXECUTABLE regions */
+		if (reg->flags & SBI_DOMAIN_MEMREGION_MMIO)
+			continue;
+		if (reg->flags & SBI_DOMAIN_MEMREGION_READABLE)
 			continue;
-		if (!(prot & PMP_A))
+		if (reg->flags & SBI_DOMAIN_MEMREGION_WRITEABLE)
 			continue;
-		if (prot & (PMP_R | PMP_W | PMP_X))
+		if (reg->flags & SBI_DOMAIN_MEMREGION_EXECUTABLE)
 			continue;
 
-		fdt_resv_memory_update_node(fdt, addr, size, j, parent, false);
-		j++;
+		addr = reg->base;
+		size = 1UL << reg->order;
+		fdt_resv_memory_update_node(fdt, addr, size, i, parent,
+			(sbi_hart_pmp_count(scratch)) ? false : true);
+		i++;
 	}
 
 	return 0;