diff --git a/src/soc/amd/cezanne/root_complex.c b/src/soc/amd/cezanne/root_complex.c
index 848392213b..b6a28d40ee 100644
--- a/src/soc/amd/cezanne/root_complex.c
+++ b/src/soc/amd/cezanne/root_complex.c
@@ -120,28 +120,25 @@ static void read_resources(struct device *dev)
 	fixed_io_range_reserved(dev, idx++, PCI_IO_CONFIG_INDEX, PCI_IO_CONFIG_PORT_COUNT);
 
 	/* 0x0 - 0x9ffff */
-	ram_resource_kb(dev, idx++, 0, 0xa0000 / KiB);
+	ram_range(dev, idx++, 0, 0xa0000);
 
 	/* 0xa0000 - 0xbffff: legacy VGA */
-	mmio_resource_kb(dev, idx++, VGA_MMIO_BASE / KiB, VGA_MMIO_SIZE / KiB);
+	mmio_range(dev, idx++, VGA_MMIO_BASE, VGA_MMIO_SIZE);
 
 	/* 0xc0000 - 0xfffff: Option ROM */
-	reserved_ram_resource_kb(dev, idx++, 0xc0000 / KiB, 0x40000 / KiB);
+	reserved_ram_from_to(dev, idx++, 0xc0000, 1 * MiB);
 
 	/* 1MiB - bottom of DRAM reserved for early coreboot usage */
-	ram_resource_kb(dev, idx++, (1 * MiB) / KiB,
-		     (early_reserved_dram_start - (1 * MiB)) / KiB);
+	ram_from_to(dev, idx++, 1 * MiB, early_reserved_dram_start);
 
 	/* DRAM reserved for early coreboot usage */
-	reserved_ram_resource_kb(dev, idx++, early_reserved_dram_start / KiB,
-		(early_reserved_dram_end - early_reserved_dram_start) / KiB);
+	reserved_ram_from_to(dev, idx++, early_reserved_dram_start, early_reserved_dram_end);
 
 	/*
 	 * top of DRAM consumed early - low top usable RAM
 	 * cbmem_top() accounts for low UMA and TSEG if they are used.
 	 */
-	ram_resource_kb(dev, idx++, early_reserved_dram_end / KiB,
-		     (mem_usable - early_reserved_dram_end) / KiB);
+	ram_from_to(dev, idx++, early_reserved_dram_end, mem_usable);
 
 	mmconf_resource(dev, idx++);
 
@@ -164,9 +161,9 @@ static void read_resources(struct device *dev)
 			continue; /* Done separately */
 
 		if (res->type == EFI_RESOURCE_SYSTEM_MEMORY)
-			ram_resource_kb(dev, idx++, res->addr / KiB, res->length / KiB);
+			ram_range(dev, idx++, res->addr, res->length);
 		else if (res->type == EFI_RESOURCE_MEMORY_RESERVED)
-			reserved_ram_resource_kb(dev, idx++, res->addr / KiB, res->length / KiB);
+			reserved_ram_range(dev, idx++, res->addr, res->length);
 		else
 			printk(BIOS_ERR, "failed to set resources for type %d\n",
 					res->type);
diff --git a/src/soc/amd/glinda/root_complex.c b/src/soc/amd/glinda/root_complex.c
index 470dd49406..4e6eaeda95 100644
--- a/src/soc/amd/glinda/root_complex.c
+++ b/src/soc/amd/glinda/root_complex.c
@@ -135,28 +135,25 @@ static void read_resources(struct device *dev)
 	fixed_io_range_reserved(dev, idx++, PCI_IO_CONFIG_INDEX, PCI_IO_CONFIG_PORT_COUNT);
 
 	/* 0x0 - 0x9ffff */
-	ram_resource_kb(dev, idx++, 0, 0xa0000 / KiB);
+	ram_range(dev, idx++, 0, 0xa0000);
 
 	/* 0xa0000 - 0xbffff: legacy VGA */
-	mmio_resource_kb(dev, idx++, VGA_MMIO_BASE / KiB, VGA_MMIO_SIZE / KiB);
+	mmio_range(dev, idx++, VGA_MMIO_BASE, VGA_MMIO_SIZE);
 
 	/* 0xc0000 - 0xfffff: Option ROM */
-	reserved_ram_resource_kb(dev, idx++, 0xc0000 / KiB, 0x40000 / KiB);
+	reserved_ram_from_to(dev, idx++, 0xc0000, 1 * MiB);
 
 	/* 1MiB - bottom of DRAM reserved for early coreboot usage */
-	ram_resource_kb(dev, idx++, (1 * MiB) / KiB,
-		     (early_reserved_dram_start - (1 * MiB)) / KiB);
+	ram_from_to(dev, idx++, 1 * MiB, early_reserved_dram_start);
 
 	/* DRAM reserved for early coreboot usage */
-	reserved_ram_resource_kb(dev, idx++, early_reserved_dram_start / KiB,
-		(early_reserved_dram_end - early_reserved_dram_start) / KiB);
+	reserved_ram_from_to(dev, idx++, early_reserved_dram_start, early_reserved_dram_end);
 
 	/*
 	 * top of DRAM consumed early - low top usable RAM
 	 * cbmem_top() accounts for low UMA and TSEG if they are used.
 	 */
-	ram_resource_kb(dev, idx++, early_reserved_dram_end / KiB,
-		     (mem_usable - early_reserved_dram_end) / KiB);
+	ram_from_to(dev, idx++, early_reserved_dram_end, mem_usable);
 
 	mmconf_resource(dev, idx++);
 
@@ -179,9 +176,9 @@ static void read_resources(struct device *dev)
 			continue; /* Done separately */
 
 		if (res->type == EFI_RESOURCE_SYSTEM_MEMORY)
-			ram_resource_kb(dev, idx++, res->addr / KiB, res->length / KiB);
+			ram_range(dev, idx++, res->addr, res->length);
 		else if (res->type == EFI_RESOURCE_MEMORY_RESERVED)
-			reserved_ram_resource_kb(dev, idx++, res->addr / KiB, res->length / KiB);
+			reserved_ram_range(dev, idx++, res->addr, res->length);
 		else
 			printk(BIOS_ERR, "Failed to set resources for type %d\n",
 					res->type);
diff --git a/src/soc/amd/mendocino/root_complex.c b/src/soc/amd/mendocino/root_complex.c
index 5e1e11a431..cc21592e9e 100644
--- a/src/soc/amd/mendocino/root_complex.c
+++ b/src/soc/amd/mendocino/root_complex.c
@@ -163,28 +163,25 @@ static void read_resources(struct device *dev)
 	fixed_io_range_reserved(dev, idx++, PCI_IO_CONFIG_INDEX, PCI_IO_CONFIG_PORT_COUNT);
 
 	/* 0x0 - 0x9ffff */
-	ram_resource_kb(dev, idx++, 0, 0xa0000 / KiB);
+	ram_range(dev, idx++, 0, 0xa0000);
 
 	/* 0xa0000 - 0xbffff: legacy VGA */
-	mmio_resource_kb(dev, idx++, VGA_MMIO_BASE / KiB, VGA_MMIO_SIZE / KiB);
+	mmio_range(dev, idx++, VGA_MMIO_BASE, VGA_MMIO_SIZE);
 
 	/* 0xc0000 - 0xfffff: Option ROM */
-	reserved_ram_resource_kb(dev, idx++, 0xc0000 / KiB, 0x40000 / KiB);
+	reserved_ram_from_to(dev, idx++, 0xc0000, 1 * MiB);
 
 	/* 1MiB - bottom of DRAM reserved for early coreboot usage */
-	ram_resource_kb(dev, idx++, (1 * MiB) / KiB,
-		     (early_reserved_dram_start - (1 * MiB)) / KiB);
+	ram_from_to(dev, idx++, 1 * MiB, early_reserved_dram_start);
 
 	/* DRAM reserved for early coreboot usage */
-	reserved_ram_resource_kb(dev, idx++, early_reserved_dram_start / KiB,
-		(early_reserved_dram_end - early_reserved_dram_start) / KiB);
+	reserved_ram_from_to(dev, idx++, early_reserved_dram_start, early_reserved_dram_end);
 
 	/*
 	 * top of DRAM consumed early - low top usable RAM
 	 * cbmem_top() accounts for low UMA and TSEG if they are used.
 	 */
-	ram_resource_kb(dev, idx++, early_reserved_dram_end / KiB,
-		     (mem_usable - early_reserved_dram_end) / KiB);
+	ram_from_to(dev, idx++, early_reserved_dram_end, mem_usable);
 
 	mmconf_resource(dev, idx++);
 
@@ -207,9 +204,9 @@ static void read_resources(struct device *dev)
 			continue; /* Done separately */
 
 		if (res->type == EFI_RESOURCE_SYSTEM_MEMORY)
-			ram_resource_kb(dev, idx++, res->addr / KiB, res->length / KiB);
+			ram_range(dev, idx++, res->addr, res->length);
 		else if (res->type == EFI_RESOURCE_MEMORY_RESERVED)
-			reserved_ram_resource_kb(dev, idx++, res->addr / KiB, res->length / KiB);
+			reserved_ram_range(dev, idx++, res->addr, res->length);
 		else
 			printk(BIOS_ERR, "Failed to set resources for type %d\n",
 					res->type);
diff --git a/src/soc/amd/phoenix/root_complex.c b/src/soc/amd/phoenix/root_complex.c
index 999df58dcd..58a9a4fe47 100644
--- a/src/soc/amd/phoenix/root_complex.c
+++ b/src/soc/amd/phoenix/root_complex.c
@@ -135,28 +135,25 @@ static void read_resources(struct device *dev)
 	fixed_io_range_reserved(dev, idx++, PCI_IO_CONFIG_INDEX, PCI_IO_CONFIG_PORT_COUNT);
 
 	/* 0x0 - 0x9ffff */
-	ram_resource_kb(dev, idx++, 0, 0xa0000 / KiB);
+	ram_range(dev, idx++, 0, 0xa0000);
 
 	/* 0xa0000 - 0xbffff: legacy VGA */
-	mmio_resource_kb(dev, idx++, VGA_MMIO_BASE / KiB, VGA_MMIO_SIZE / KiB);
+	mmio_range(dev, idx++, VGA_MMIO_BASE, VGA_MMIO_SIZE);
 
 	/* 0xc0000 - 0xfffff: Option ROM */
-	reserved_ram_resource_kb(dev, idx++, 0xc0000 / KiB, 0x40000 / KiB);
+	reserved_ram_from_to(dev, idx++, 0xc0000, 1 * MiB);
 
 	/* 1MiB - bottom of DRAM reserved for early coreboot usage */
-	ram_resource_kb(dev, idx++, (1 * MiB) / KiB,
-		     (early_reserved_dram_start - (1 * MiB)) / KiB);
+	ram_from_to(dev, idx++, 1 * MiB, early_reserved_dram_start);
 
 	/* DRAM reserved for early coreboot usage */
-	reserved_ram_resource_kb(dev, idx++, early_reserved_dram_start / KiB,
-		(early_reserved_dram_end - early_reserved_dram_start) / KiB);
+	reserved_ram_from_to(dev, idx++, early_reserved_dram_start, early_reserved_dram_end);
 
 	/*
 	 * top of DRAM consumed early - low top usable RAM
 	 * cbmem_top() accounts for low UMA and TSEG if they are used.
 	 */
-	ram_resource_kb(dev, idx++, early_reserved_dram_end / KiB,
-		     (mem_usable - early_reserved_dram_end) / KiB);
+	ram_from_to(dev, idx++, early_reserved_dram_end, mem_usable);
 
 	mmconf_resource(dev, idx++);
 
@@ -179,9 +176,9 @@ static void read_resources(struct device *dev)
 			continue; /* Done separately */
 
 		if (res->type == EFI_RESOURCE_SYSTEM_MEMORY)
-			ram_resource_kb(dev, idx++, res->addr / KiB, res->length / KiB);
+			ram_range(dev, idx++, res->addr, res->length);
 		else if (res->type == EFI_RESOURCE_MEMORY_RESERVED)
-			reserved_ram_resource_kb(dev, idx++, res->addr / KiB, res->length / KiB);
+			reserved_ram_range(dev, idx++, res->addr, res->length);
 		else
 			printk(BIOS_ERR, "Failed to set resources for type %d\n",
 					res->type);
diff --git a/src/soc/amd/picasso/root_complex.c b/src/soc/amd/picasso/root_complex.c
index 27f2fcf927..526c7cf48d 100644
--- a/src/soc/amd/picasso/root_complex.c
+++ b/src/soc/amd/picasso/root_complex.c
@@ -120,26 +120,23 @@ static void read_resources(struct device *dev)
 	fixed_io_range_reserved(dev, idx++, PCI_IO_CONFIG_INDEX, PCI_IO_CONFIG_PORT_COUNT);
 
 	/* 0x0 - 0x9ffff */
-	ram_resource_kb(dev, idx++, 0, 0xa0000 / KiB);
+	ram_range(dev, idx++, 0, 0xa0000);
 
 	/* 0xa0000 - 0xbffff: legacy VGA */
-	mmio_resource_kb(dev, idx++, VGA_MMIO_BASE / KiB, VGA_MMIO_SIZE / KiB);
+	mmio_range(dev, idx++, VGA_MMIO_BASE, VGA_MMIO_SIZE);
 
 	/* 0xc0000 - 0xfffff: Option ROM */
-	reserved_ram_resource_kb(dev, idx++, 0xc0000 / KiB, 0x40000 / KiB);
+	reserved_ram_from_to(dev, idx++, 0xc0000, 1 * MiB);
 
 	/* 1MB - bottom of DRAM reserved for early coreboot usage */
-	ram_resource_kb(dev, idx++, (1 * MiB) / KiB,
-		     (early_reserved_dram_start - (1 * MiB)) / KiB);
+	ram_from_to(dev, idx++, 1 * MiB, early_reserved_dram_start);
 
 	/* DRAM reserved for early coreboot usage */
-	reserved_ram_resource_kb(dev, idx++, early_reserved_dram_start / KiB,
-		(early_reserved_dram_end - early_reserved_dram_start) / KiB);
+	reserved_ram_from_to(dev, idx++, early_reserved_dram_start, early_reserved_dram_end);
 
 	/* top of DRAM consumed early - low top usable RAM
 	 * cbmem_top() accounts for low UMA and TSEG if they are used. */
-	ram_resource_kb(dev, idx++, early_reserved_dram_end / KiB,
-		     (mem_usable - early_reserved_dram_end) / KiB);
+	ram_from_to(dev, idx++, early_reserved_dram_end, mem_usable);
 
 	mmconf_resource(dev, idx++);
 
@@ -161,9 +158,9 @@ static void read_resources(struct device *dev)
 			continue; /* Done separately */
 
 		if (res->type == EFI_RESOURCE_SYSTEM_MEMORY)
-			ram_resource_kb(dev, idx++, res->addr / KiB, res->length / KiB);
+			ram_range(dev, idx++, res->addr, res->length);
 		else if (res->type == EFI_RESOURCE_MEMORY_RESERVED)
-			reserved_ram_resource_kb(dev, idx++, res->addr / KiB, res->length / KiB);
+			reserved_ram_range(dev, idx++, res->addr, res->length);
 		else
 			printk(BIOS_ERR, "failed to set resources for type %d\n",
 					res->type);