remoteproc: elf_loader: Add elf resource table load support

Add rproc_elf_load_rsc_table(), which searches for a resource table in
an elf64/elf32 image, and if found, copies it to device memory.
Add also the elf32 and elf64 variants of this API.
Add a test for this.

Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
Acked-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>

1 files changed, 80 insertions, 11 deletions

diff --git a/test/dm/remoteproc.c b/test/dm/remoteproc.c
index 1d9a9b32d5..40675962d8 100644
--- a/test/dm/remoteproc.c
+++ b/test/dm/remoteproc.c
@@ -103,8 +103,8 @@ static int dm_test_remoteproc_elf(struct unit_test_state *uts)
 		0x00, 0x00, 0x00, 0x08,
 		/* phoff (program header offset @ 0x40)*/
 		0x40, 0x00, 0x00, 0x00,
-		/* shoff (section header offset : none) */
-		0x00, 0x00, 0x00, 0x00,
+		/* shoff (section header offset @ 0x90) */
+		0x90, 0x00, 0x00, 0x00,
 		/* flags */
 		0x00, 0x00, 0x00, 0x00,
 		/* ehsize (elf header size = 0x34) */
@@ -113,16 +113,17 @@ static int dm_test_remoteproc_elf(struct unit_test_state *uts)
 		0x20, 0x00,
 		/* phnum (program header number : 1) */
 		0x01, 0x00,
-		/* shentsize (section heade size : none) */
-		0x00, 0x00,
-		/* shnum (section header number: none) */
-		0x00, 0x00,
-		/* shstrndx (section header name section index: none) */
-		0x00, 0x00,
+		/* shentsize (section header size : 40 bytes) */
+		0x28, 0x00,
+		/* shnum (section header number: 3) */
+		0x02, 0x00,
+		/* shstrndx (section header name section index: 1) */
+		0x01, 0x00,
 		/* padding */
 		0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00,
 		0x00, 0x00, 0x00, 0x00,
+
 		/* @0x40 - PROGRAM HEADER TABLE - */
 		/* type : PT_LOAD */
 		0x01, 0x00, 0x00, 0x00,
@@ -140,14 +141,63 @@ static int dm_test_remoteproc_elf(struct unit_test_state *uts)
 		0x05, 0x00, 0x00, 0x00,
 		/* padding */
 		0x00, 0x00, 0x00, 0x00,
+
+		/* @0x60 - RESOURCE TABLE SECTION - */
+		/* version */
+		0x01, 0x00, 0x00, 0x00,
+		/* num (0, no entries) */
+		0x00, 0x00, 0x00, 0x00,
+		/* Reserved */
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+
+		/* @0x70 - SECTION'S NAMES SECTION - */
+		/* section 0 name (".shrtrtab") */
+		0x2e, 0x73, 0x68, 0x73, 0x74, 0x72, 0x74, 0x61, 0x62, 0x00,
+		/* section 1 name (".resource_table") */
+		0x2e, 0x72, 0x65, 0x73, 0x6f, 0x75, 0x72, 0x63, 0x65, 0x5f,
+		0x74, 0x61, 0x62, 0x6c, 0x65, 0x00,
+		/* padding */
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+
+		/* @0x90 - SECTION HEADER TABLE - */
+		/* Section 0 : resource table header */
+		/* sh_name - index into section header string table section */
+		0x0a, 0x00, 0x00, 0x00,
+		/* sh_type and sh_flags */
+		0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
+		/* sh_addr = where the resource table has to be copied to */
+		0x00, 0x00, 0x00, 0x00,
+		/* sh_offset = 0x60 */
+		0x60, 0x00, 0x00, 0x00,
+		/* sh_size = 16 bytes */
+		0x10, 0x00, 0x00, 0x00,
+		/* sh_link, sh_info, sh_addralign, sh_entsize */
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		/* Section 1 : section's names section header */
+		/* sh_name - index into section header string table section */
+		0x00, 0x00, 0x00, 0x00,
+		/* sh_type and sh_flags */
+		0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		/* sh_addr  */
+		0x00, 0x00, 0x00, 0x00,
+		/* sh_offset = 0x70 */
+		0x70, 0x00, 0x00, 0x00,
+		/* sh_size = 27 bytes */
+		0x1b, 0x00, 0x00, 0x00,
+		/* sh_link, sh_info, sh_addralign, sh_entsize */
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 	};
 	unsigned int size = ARRAY_SIZE(valid_elf32);
 	struct udevice *dev;
-	phys_addr_t loaded_firmware_paddr;
-	void *loaded_firmware;
-	u32 loaded_firmware_size;
+	phys_addr_t loaded_firmware_paddr, loaded_rsc_table_paddr;
+	void *loaded_firmware, *loaded_rsc_table;
+	u32 loaded_firmware_size, rsc_table_size;
+	ulong rsc_addr, rsc_size;
 	Elf32_Ehdr *ehdr = (Elf32_Ehdr *)valid_elf32;
 	Elf32_Phdr *phdr = (Elf32_Phdr *)(valid_elf32 + ehdr->e_phoff);
+	Elf32_Shdr *shdr = (Elf32_Shdr *)(valid_elf32 + ehdr->e_shoff);
 
 	ut_assertok(uclass_get_device(UCLASS_REMOTEPROC, 0, &dev));
 
@@ -178,6 +228,25 @@ static int dm_test_remoteproc_elf(struct unit_test_state *uts)
 		    0x08000000);
 	unmap_physmem(loaded_firmware, MAP_NOCACHE);
 
+	/* Resource table */
+	shdr->sh_addr = CONFIG_SYS_SDRAM_BASE;
+	rsc_table_size = shdr->sh_size;
+
+	loaded_rsc_table_paddr = shdr->sh_addr + DEVICE_TO_PHYSICAL_OFFSET;
+	loaded_rsc_table = map_physmem(loaded_rsc_table_paddr,
+				       rsc_table_size, MAP_NOCACHE);
+	ut_assertnonnull(loaded_rsc_table);
+	memset(loaded_rsc_table, 0, rsc_table_size);
+
+	/* Load and verify */
+	ut_assertok(rproc_elf32_load_rsc_table(dev, (ulong)valid_elf32, size,
+					       &rsc_addr, &rsc_size));
+	ut_asserteq(rsc_addr, CONFIG_SYS_SDRAM_BASE);
+	ut_asserteq(rsc_size, rsc_table_size);
+	ut_assertok(memcmp(loaded_firmware, valid_elf32 + shdr->sh_offset,
+			   shdr->sh_size));
+	unmap_physmem(loaded_firmware, MAP_NOCACHE);
+
 	/* Invalid ELF Magic */
 	valid_elf32[0] = 0;
 	ut_asserteq(-EPROTONOSUPPORT,