Implement CRC32 algorithm for RISC-V.

Signed-off-by: Tim Newsome <tim@sifive.com>
Change-Id: Id437f78e74e3d837ff203f84c4eeb996bfad9a01
Reviewed-on: http://openocd.zylin.com/6076
Reviewed-by: Jan Matyas <matyas@codasip.com>
Reviewed-by: Marc Schink <dev@zapb.de>
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: jenkins

6 files changed, 382 insertions, 6 deletions

diff --git a/contrib/loaders/checksum/Makefile b/contrib/loaders/checksum/Makefile
index b9f59b8..623e425 100644
--- a/contrib/loaders/checksum/Makefile
+++ b/contrib/loaders/checksum/Makefile
@@ -6,25 +6,41 @@ ARM_OBJCOPY ?= $(ARM_CROSS_COMPILE)objcopy
 
 ARM_AFLAGS = -EL
 
+RISCV_CROSS_COMPILE ?= riscv64-unknown-elf-
+RISCV_CC      ?= $(RISCV_CROSS_COMPILE)gcc
+RISCV_OBJCOPY ?= $(RISCV_CROSS_COMPILE)objcopy
+RISCV32_CFLAGS = -march=rv32e -mabi=ilp32e -nostdlib -nostartfiles -Os -fPIC
+RISCV64_CFLAGS = -march=rv64i -mabi=lp64 -nostdlib -nostartfiles -Os -fPIC
+
+all:	arm riscv
+
 arm: armv4_5_crc.inc armv7m_crc.inc
 
+riscv:	riscv32_crc.inc riscv64_crc.inc
+
 armv4_5_%.elf: armv4_5_%.s
 	$(ARM_AS) $(ARM_AFLAGS) $< -o $@
 
 armv4_5_%.bin: armv4_5_%.elf
 	$(ARM_OBJCOPY) -Obinary $< $@
 
-armv4_5_%.inc: armv4_5_%.bin
-	$(BIN2C) < $< > $@
-
 armv7m_%.elf: armv7m_%.s
 	$(ARM_AS) $(ARM_AFLAGS) $< -o $@
 
 armv7m_%.bin: armv7m_%.elf
 	$(ARM_OBJCOPY) -Obinary $< $@
 
-armv7m_%.inc: armv7m_%.bin
+%.inc: %.bin
 	$(BIN2C) < $< > $@
 
+riscv32_%.elf:	riscv_%.c
+	$(RISCV_CC) $(RISCV32_CFLAGS) $< -o $@
+
+riscv64_%.elf:	riscv_%.c
+	$(RISCV_CC) $(RISCV64_CFLAGS) $< -o $@
+
+riscv%.bin:	riscv%.elf
+	$(RISCV_OBJCOPY) -Obinary $< $@
+
 clean:
 	-rm -f *.elf *.bin *.inc
diff --git a/contrib/loaders/checksum/riscv32_crc.inc b/contrib/loaders/checksum/riscv32_crc.inc
new file mode 100644
index 0000000..d6566d2
--- /dev/null
+++ b/contrib/loaders/checksum/riscv32_crc.inc
@@ -0,0 +1,70 @@
+/* Autogenerated with ../../../src/helper/bin2char.sh */
+0xb3,0x05,0xb5,0x00,0x93,0x07,0xf0,0xff,0x17,0x07,0x00,0x00,0x13,0x07,0x47,0x04,
+0x63,0x1a,0xb5,0x00,0x13,0x85,0x07,0x00,0x73,0x00,0x10,0x00,0x13,0x85,0x07,0x00,
+0x67,0x80,0x00,0x00,0x03,0x46,0x05,0x00,0x93,0x96,0x87,0x00,0x93,0xd7,0x87,0x01,
+0xb3,0xc7,0xc7,0x00,0x93,0x97,0x27,0x00,0xb3,0x07,0xf7,0x00,0x83,0xa7,0x07,0x00,
+0x13,0x05,0x15,0x00,0xb3,0xc7,0xf6,0x00,0x6f,0xf0,0x9f,0xfc,0x00,0x00,0x00,0x00,
+0xb7,0x1d,0xc1,0x04,0x6e,0x3b,0x82,0x09,0xd9,0x26,0x43,0x0d,0xdc,0x76,0x04,0x13,
+0x6b,0x6b,0xc5,0x17,0xb2,0x4d,0x86,0x1a,0x05,0x50,0x47,0x1e,0xb8,0xed,0x08,0x26,
+0x0f,0xf0,0xc9,0x22,0xd6,0xd6,0x8a,0x2f,0x61,0xcb,0x4b,0x2b,0x64,0x9b,0x0c,0x35,
+0xd3,0x86,0xcd,0x31,0x0a,0xa0,0x8e,0x3c,0xbd,0xbd,0x4f,0x38,0x70,0xdb,0x11,0x4c,
+0xc7,0xc6,0xd0,0x48,0x1e,0xe0,0x93,0x45,0xa9,0xfd,0x52,0x41,0xac,0xad,0x15,0x5f,
+0x1b,0xb0,0xd4,0x5b,0xc2,0x96,0x97,0x56,0x75,0x8b,0x56,0x52,0xc8,0x36,0x19,0x6a,
+0x7f,0x2b,0xd8,0x6e,0xa6,0x0d,0x9b,0x63,0x11,0x10,0x5a,0x67,0x14,0x40,0x1d,0x79,
+0xa3,0x5d,0xdc,0x7d,0x7a,0x7b,0x9f,0x70,0xcd,0x66,0x5e,0x74,0xe0,0xb6,0x23,0x98,
+0x57,0xab,0xe2,0x9c,0x8e,0x8d,0xa1,0x91,0x39,0x90,0x60,0x95,0x3c,0xc0,0x27,0x8b,
+0x8b,0xdd,0xe6,0x8f,0x52,0xfb,0xa5,0x82,0xe5,0xe6,0x64,0x86,0x58,0x5b,0x2b,0xbe,
+0xef,0x46,0xea,0xba,0x36,0x60,0xa9,0xb7,0x81,0x7d,0x68,0xb3,0x84,0x2d,0x2f,0xad,
+0x33,0x30,0xee,0xa9,0xea,0x16,0xad,0xa4,0x5d,0x0b,0x6c,0xa0,0x90,0x6d,0x32,0xd4,
+0x27,0x70,0xf3,0xd0,0xfe,0x56,0xb0,0xdd,0x49,0x4b,0x71,0xd9,0x4c,0x1b,0x36,0xc7,
+0xfb,0x06,0xf7,0xc3,0x22,0x20,0xb4,0xce,0x95,0x3d,0x75,0xca,0x28,0x80,0x3a,0xf2,
+0x9f,0x9d,0xfb,0xf6,0x46,0xbb,0xb8,0xfb,0xf1,0xa6,0x79,0xff,0xf4,0xf6,0x3e,0xe1,
+0x43,0xeb,0xff,0xe5,0x9a,0xcd,0xbc,0xe8,0x2d,0xd0,0x7d,0xec,0x77,0x70,0x86,0x34,
+0xc0,0x6d,0x47,0x30,0x19,0x4b,0x04,0x3d,0xae,0x56,0xc5,0x39,0xab,0x06,0x82,0x27,
+0x1c,0x1b,0x43,0x23,0xc5,0x3d,0x00,0x2e,0x72,0x20,0xc1,0x2a,0xcf,0x9d,0x8e,0x12,
+0x78,0x80,0x4f,0x16,0xa1,0xa6,0x0c,0x1b,0x16,0xbb,0xcd,0x1f,0x13,0xeb,0x8a,0x01,
+0xa4,0xf6,0x4b,0x05,0x7d,0xd0,0x08,0x08,0xca,0xcd,0xc9,0x0c,0x07,0xab,0x97,0x78,
+0xb0,0xb6,0x56,0x7c,0x69,0x90,0x15,0x71,0xde,0x8d,0xd4,0x75,0xdb,0xdd,0x93,0x6b,
+0x6c,0xc0,0x52,0x6f,0xb5,0xe6,0x11,0x62,0x02,0xfb,0xd0,0x66,0xbf,0x46,0x9f,0x5e,
+0x08,0x5b,0x5e,0x5a,0xd1,0x7d,0x1d,0x57,0x66,0x60,0xdc,0x53,0x63,0x30,0x9b,0x4d,
+0xd4,0x2d,0x5a,0x49,0x0d,0x0b,0x19,0x44,0xba,0x16,0xd8,0x40,0x97,0xc6,0xa5,0xac,
+0x20,0xdb,0x64,0xa8,0xf9,0xfd,0x27,0xa5,0x4e,0xe0,0xe6,0xa1,0x4b,0xb0,0xa1,0xbf,
+0xfc,0xad,0x60,0xbb,0x25,0x8b,0x23,0xb6,0x92,0x96,0xe2,0xb2,0x2f,0x2b,0xad,0x8a,
+0x98,0x36,0x6c,0x8e,0x41,0x10,0x2f,0x83,0xf6,0x0d,0xee,0x87,0xf3,0x5d,0xa9,0x99,
+0x44,0x40,0x68,0x9d,0x9d,0x66,0x2b,0x90,0x2a,0x7b,0xea,0x94,0xe7,0x1d,0xb4,0xe0,
+0x50,0x00,0x75,0xe4,0x89,0x26,0x36,0xe9,0x3e,0x3b,0xf7,0xed,0x3b,0x6b,0xb0,0xf3,
+0x8c,0x76,0x71,0xf7,0x55,0x50,0x32,0xfa,0xe2,0x4d,0xf3,0xfe,0x5f,0xf0,0xbc,0xc6,
+0xe8,0xed,0x7d,0xc2,0x31,0xcb,0x3e,0xcf,0x86,0xd6,0xff,0xcb,0x83,0x86,0xb8,0xd5,
+0x34,0x9b,0x79,0xd1,0xed,0xbd,0x3a,0xdc,0x5a,0xa0,0xfb,0xd8,0xee,0xe0,0x0c,0x69,
+0x59,0xfd,0xcd,0x6d,0x80,0xdb,0x8e,0x60,0x37,0xc6,0x4f,0x64,0x32,0x96,0x08,0x7a,
+0x85,0x8b,0xc9,0x7e,0x5c,0xad,0x8a,0x73,0xeb,0xb0,0x4b,0x77,0x56,0x0d,0x04,0x4f,
+0xe1,0x10,0xc5,0x4b,0x38,0x36,0x86,0x46,0x8f,0x2b,0x47,0x42,0x8a,0x7b,0x00,0x5c,
+0x3d,0x66,0xc1,0x58,0xe4,0x40,0x82,0x55,0x53,0x5d,0x43,0x51,0x9e,0x3b,0x1d,0x25,
+0x29,0x26,0xdc,0x21,0xf0,0x00,0x9f,0x2c,0x47,0x1d,0x5e,0x28,0x42,0x4d,0x19,0x36,
+0xf5,0x50,0xd8,0x32,0x2c,0x76,0x9b,0x3f,0x9b,0x6b,0x5a,0x3b,0x26,0xd6,0x15,0x03,
+0x91,0xcb,0xd4,0x07,0x48,0xed,0x97,0x0a,0xff,0xf0,0x56,0x0e,0xfa,0xa0,0x11,0x10,
+0x4d,0xbd,0xd0,0x14,0x94,0x9b,0x93,0x19,0x23,0x86,0x52,0x1d,0x0e,0x56,0x2f,0xf1,
+0xb9,0x4b,0xee,0xf5,0x60,0x6d,0xad,0xf8,0xd7,0x70,0x6c,0xfc,0xd2,0x20,0x2b,0xe2,
+0x65,0x3d,0xea,0xe6,0xbc,0x1b,0xa9,0xeb,0x0b,0x06,0x68,0xef,0xb6,0xbb,0x27,0xd7,
+0x01,0xa6,0xe6,0xd3,0xd8,0x80,0xa5,0xde,0x6f,0x9d,0x64,0xda,0x6a,0xcd,0x23,0xc4,
+0xdd,0xd0,0xe2,0xc0,0x04,0xf6,0xa1,0xcd,0xb3,0xeb,0x60,0xc9,0x7e,0x8d,0x3e,0xbd,
+0xc9,0x90,0xff,0xb9,0x10,0xb6,0xbc,0xb4,0xa7,0xab,0x7d,0xb0,0xa2,0xfb,0x3a,0xae,
+0x15,0xe6,0xfb,0xaa,0xcc,0xc0,0xb8,0xa7,0x7b,0xdd,0x79,0xa3,0xc6,0x60,0x36,0x9b,
+0x71,0x7d,0xf7,0x9f,0xa8,0x5b,0xb4,0x92,0x1f,0x46,0x75,0x96,0x1a,0x16,0x32,0x88,
+0xad,0x0b,0xf3,0x8c,0x74,0x2d,0xb0,0x81,0xc3,0x30,0x71,0x85,0x99,0x90,0x8a,0x5d,
+0x2e,0x8d,0x4b,0x59,0xf7,0xab,0x08,0x54,0x40,0xb6,0xc9,0x50,0x45,0xe6,0x8e,0x4e,
+0xf2,0xfb,0x4f,0x4a,0x2b,0xdd,0x0c,0x47,0x9c,0xc0,0xcd,0x43,0x21,0x7d,0x82,0x7b,
+0x96,0x60,0x43,0x7f,0x4f,0x46,0x00,0x72,0xf8,0x5b,0xc1,0x76,0xfd,0x0b,0x86,0x68,
+0x4a,0x16,0x47,0x6c,0x93,0x30,0x04,0x61,0x24,0x2d,0xc5,0x65,0xe9,0x4b,0x9b,0x11,
+0x5e,0x56,0x5a,0x15,0x87,0x70,0x19,0x18,0x30,0x6d,0xd8,0x1c,0x35,0x3d,0x9f,0x02,
+0x82,0x20,0x5e,0x06,0x5b,0x06,0x1d,0x0b,0xec,0x1b,0xdc,0x0f,0x51,0xa6,0x93,0x37,
+0xe6,0xbb,0x52,0x33,0x3f,0x9d,0x11,0x3e,0x88,0x80,0xd0,0x3a,0x8d,0xd0,0x97,0x24,
+0x3a,0xcd,0x56,0x20,0xe3,0xeb,0x15,0x2d,0x54,0xf6,0xd4,0x29,0x79,0x26,0xa9,0xc5,
+0xce,0x3b,0x68,0xc1,0x17,0x1d,0x2b,0xcc,0xa0,0x00,0xea,0xc8,0xa5,0x50,0xad,0xd6,
+0x12,0x4d,0x6c,0xd2,0xcb,0x6b,0x2f,0xdf,0x7c,0x76,0xee,0xdb,0xc1,0xcb,0xa1,0xe3,
+0x76,0xd6,0x60,0xe7,0xaf,0xf0,0x23,0xea,0x18,0xed,0xe2,0xee,0x1d,0xbd,0xa5,0xf0,
+0xaa,0xa0,0x64,0xf4,0x73,0x86,0x27,0xf9,0xc4,0x9b,0xe6,0xfd,0x09,0xfd,0xb8,0x89,
+0xbe,0xe0,0x79,0x8d,0x67,0xc6,0x3a,0x80,0xd0,0xdb,0xfb,0x84,0xd5,0x8b,0xbc,0x9a,
+0x62,0x96,0x7d,0x9e,0xbb,0xb0,0x3e,0x93,0x0c,0xad,0xff,0x97,0xb1,0x10,0xb0,0xaf,
+0x06,0x0d,0x71,0xab,0xdf,0x2b,0x32,0xa6,0x68,0x36,0xf3,0xa2,0x6d,0x66,0xb4,0xbc,
+0xda,0x7b,0x75,0xb8,0x03,0x5d,0x36,0xb5,0xb4,0x40,0xf7,0xb1,
diff --git a/contrib/loaders/checksum/riscv64_crc.inc b/contrib/loaders/checksum/riscv64_crc.inc
new file mode 100644
index 0000000..e131d77
--- /dev/null
+++ b/contrib/loaders/checksum/riscv64_crc.inc
@@ -0,0 +1,71 @@
+/* Autogenerated with ../../../src/helper/bin2char.sh */
+0x93,0x07,0xf0,0xff,0x93,0x06,0xf0,0xff,0x17,0x06,0x00,0x00,0x13,0x06,0x06,0x05,
+0x9b,0x85,0xf5,0xff,0x63,0x9a,0xd5,0x00,0x13,0x85,0x07,0x00,0x73,0x00,0x10,0x00,
+0x13,0x85,0x07,0x00,0x67,0x80,0x00,0x00,0x83,0x48,0x05,0x00,0x1b,0xd7,0x87,0x01,
+0x1b,0x98,0x87,0x00,0x33,0x47,0x17,0x01,0x13,0x17,0x27,0x00,0x33,0x07,0xe6,0x00,
+0x83,0x27,0x07,0x00,0x13,0x05,0x15,0x00,0xb3,0xc7,0x07,0x01,0x9b,0x87,0x07,0x00,
+0x6f,0xf0,0x1f,0xfc,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xb7,0x1d,0xc1,0x04,
+0x6e,0x3b,0x82,0x09,0xd9,0x26,0x43,0x0d,0xdc,0x76,0x04,0x13,0x6b,0x6b,0xc5,0x17,
+0xb2,0x4d,0x86,0x1a,0x05,0x50,0x47,0x1e,0xb8,0xed,0x08,0x26,0x0f,0xf0,0xc9,0x22,
+0xd6,0xd6,0x8a,0x2f,0x61,0xcb,0x4b,0x2b,0x64,0x9b,0x0c,0x35,0xd3,0x86,0xcd,0x31,
+0x0a,0xa0,0x8e,0x3c,0xbd,0xbd,0x4f,0x38,0x70,0xdb,0x11,0x4c,0xc7,0xc6,0xd0,0x48,
+0x1e,0xe0,0x93,0x45,0xa9,0xfd,0x52,0x41,0xac,0xad,0x15,0x5f,0x1b,0xb0,0xd4,0x5b,
+0xc2,0x96,0x97,0x56,0x75,0x8b,0x56,0x52,0xc8,0x36,0x19,0x6a,0x7f,0x2b,0xd8,0x6e,
+0xa6,0x0d,0x9b,0x63,0x11,0x10,0x5a,0x67,0x14,0x40,0x1d,0x79,0xa3,0x5d,0xdc,0x7d,
+0x7a,0x7b,0x9f,0x70,0xcd,0x66,0x5e,0x74,0xe0,0xb6,0x23,0x98,0x57,0xab,0xe2,0x9c,
+0x8e,0x8d,0xa1,0x91,0x39,0x90,0x60,0x95,0x3c,0xc0,0x27,0x8b,0x8b,0xdd,0xe6,0x8f,
+0x52,0xfb,0xa5,0x82,0xe5,0xe6,0x64,0x86,0x58,0x5b,0x2b,0xbe,0xef,0x46,0xea,0xba,
+0x36,0x60,0xa9,0xb7,0x81,0x7d,0x68,0xb3,0x84,0x2d,0x2f,0xad,0x33,0x30,0xee,0xa9,
+0xea,0x16,0xad,0xa4,0x5d,0x0b,0x6c,0xa0,0x90,0x6d,0x32,0xd4,0x27,0x70,0xf3,0xd0,
+0xfe,0x56,0xb0,0xdd,0x49,0x4b,0x71,0xd9,0x4c,0x1b,0x36,0xc7,0xfb,0x06,0xf7,0xc3,
+0x22,0x20,0xb4,0xce,0x95,0x3d,0x75,0xca,0x28,0x80,0x3a,0xf2,0x9f,0x9d,0xfb,0xf6,
+0x46,0xbb,0xb8,0xfb,0xf1,0xa6,0x79,0xff,0xf4,0xf6,0x3e,0xe1,0x43,0xeb,0xff,0xe5,
+0x9a,0xcd,0xbc,0xe8,0x2d,0xd0,0x7d,0xec,0x77,0x70,0x86,0x34,0xc0,0x6d,0x47,0x30,
+0x19,0x4b,0x04,0x3d,0xae,0x56,0xc5,0x39,0xab,0x06,0x82,0x27,0x1c,0x1b,0x43,0x23,
+0xc5,0x3d,0x00,0x2e,0x72,0x20,0xc1,0x2a,0xcf,0x9d,0x8e,0x12,0x78,0x80,0x4f,0x16,
+0xa1,0xa6,0x0c,0x1b,0x16,0xbb,0xcd,0x1f,0x13,0xeb,0x8a,0x01,0xa4,0xf6,0x4b,0x05,
+0x7d,0xd0,0x08,0x08,0xca,0xcd,0xc9,0x0c,0x07,0xab,0x97,0x78,0xb0,0xb6,0x56,0x7c,
+0x69,0x90,0x15,0x71,0xde,0x8d,0xd4,0x75,0xdb,0xdd,0x93,0x6b,0x6c,0xc0,0x52,0x6f,
+0xb5,0xe6,0x11,0x62,0x02,0xfb,0xd0,0x66,0xbf,0x46,0x9f,0x5e,0x08,0x5b,0x5e,0x5a,
+0xd1,0x7d,0x1d,0x57,0x66,0x60,0xdc,0x53,0x63,0x30,0x9b,0x4d,0xd4,0x2d,0x5a,0x49,
+0x0d,0x0b,0x19,0x44,0xba,0x16,0xd8,0x40,0x97,0xc6,0xa5,0xac,0x20,0xdb,0x64,0xa8,
+0xf9,0xfd,0x27,0xa5,0x4e,0xe0,0xe6,0xa1,0x4b,0xb0,0xa1,0xbf,0xfc,0xad,0x60,0xbb,
+0x25,0x8b,0x23,0xb6,0x92,0x96,0xe2,0xb2,0x2f,0x2b,0xad,0x8a,0x98,0x36,0x6c,0x8e,
+0x41,0x10,0x2f,0x83,0xf6,0x0d,0xee,0x87,0xf3,0x5d,0xa9,0x99,0x44,0x40,0x68,0x9d,
+0x9d,0x66,0x2b,0x90,0x2a,0x7b,0xea,0x94,0xe7,0x1d,0xb4,0xe0,0x50,0x00,0x75,0xe4,
+0x89,0x26,0x36,0xe9,0x3e,0x3b,0xf7,0xed,0x3b,0x6b,0xb0,0xf3,0x8c,0x76,0x71,0xf7,
+0x55,0x50,0x32,0xfa,0xe2,0x4d,0xf3,0xfe,0x5f,0xf0,0xbc,0xc6,0xe8,0xed,0x7d,0xc2,
+0x31,0xcb,0x3e,0xcf,0x86,0xd6,0xff,0xcb,0x83,0x86,0xb8,0xd5,0x34,0x9b,0x79,0xd1,
+0xed,0xbd,0x3a,0xdc,0x5a,0xa0,0xfb,0xd8,0xee,0xe0,0x0c,0x69,0x59,0xfd,0xcd,0x6d,
+0x80,0xdb,0x8e,0x60,0x37,0xc6,0x4f,0x64,0x32,0x96,0x08,0x7a,0x85,0x8b,0xc9,0x7e,
+0x5c,0xad,0x8a,0x73,0xeb,0xb0,0x4b,0x77,0x56,0x0d,0x04,0x4f,0xe1,0x10,0xc5,0x4b,
+0x38,0x36,0x86,0x46,0x8f,0x2b,0x47,0x42,0x8a,0x7b,0x00,0x5c,0x3d,0x66,0xc1,0x58,
+0xe4,0x40,0x82,0x55,0x53,0x5d,0x43,0x51,0x9e,0x3b,0x1d,0x25,0x29,0x26,0xdc,0x21,
+0xf0,0x00,0x9f,0x2c,0x47,0x1d,0x5e,0x28,0x42,0x4d,0x19,0x36,0xf5,0x50,0xd8,0x32,
+0x2c,0x76,0x9b,0x3f,0x9b,0x6b,0x5a,0x3b,0x26,0xd6,0x15,0x03,0x91,0xcb,0xd4,0x07,
+0x48,0xed,0x97,0x0a,0xff,0xf0,0x56,0x0e,0xfa,0xa0,0x11,0x10,0x4d,0xbd,0xd0,0x14,
+0x94,0x9b,0x93,0x19,0x23,0x86,0x52,0x1d,0x0e,0x56,0x2f,0xf1,0xb9,0x4b,0xee,0xf5,
+0x60,0x6d,0xad,0xf8,0xd7,0x70,0x6c,0xfc,0xd2,0x20,0x2b,0xe2,0x65,0x3d,0xea,0xe6,
+0xbc,0x1b,0xa9,0xeb,0x0b,0x06,0x68,0xef,0xb6,0xbb,0x27,0xd7,0x01,0xa6,0xe6,0xd3,
+0xd8,0x80,0xa5,0xde,0x6f,0x9d,0x64,0xda,0x6a,0xcd,0x23,0xc4,0xdd,0xd0,0xe2,0xc0,
+0x04,0xf6,0xa1,0xcd,0xb3,0xeb,0x60,0xc9,0x7e,0x8d,0x3e,0xbd,0xc9,0x90,0xff,0xb9,
+0x10,0xb6,0xbc,0xb4,0xa7,0xab,0x7d,0xb0,0xa2,0xfb,0x3a,0xae,0x15,0xe6,0xfb,0xaa,
+0xcc,0xc0,0xb8,0xa7,0x7b,0xdd,0x79,0xa3,0xc6,0x60,0x36,0x9b,0x71,0x7d,0xf7,0x9f,
+0xa8,0x5b,0xb4,0x92,0x1f,0x46,0x75,0x96,0x1a,0x16,0x32,0x88,0xad,0x0b,0xf3,0x8c,
+0x74,0x2d,0xb0,0x81,0xc3,0x30,0x71,0x85,0x99,0x90,0x8a,0x5d,0x2e,0x8d,0x4b,0x59,
+0xf7,0xab,0x08,0x54,0x40,0xb6,0xc9,0x50,0x45,0xe6,0x8e,0x4e,0xf2,0xfb,0x4f,0x4a,
+0x2b,0xdd,0x0c,0x47,0x9c,0xc0,0xcd,0x43,0x21,0x7d,0x82,0x7b,0x96,0x60,0x43,0x7f,
+0x4f,0x46,0x00,0x72,0xf8,0x5b,0xc1,0x76,0xfd,0x0b,0x86,0x68,0x4a,0x16,0x47,0x6c,
+0x93,0x30,0x04,0x61,0x24,0x2d,0xc5,0x65,0xe9,0x4b,0x9b,0x11,0x5e,0x56,0x5a,0x15,
+0x87,0x70,0x19,0x18,0x30,0x6d,0xd8,0x1c,0x35,0x3d,0x9f,0x02,0x82,0x20,0x5e,0x06,
+0x5b,0x06,0x1d,0x0b,0xec,0x1b,0xdc,0x0f,0x51,0xa6,0x93,0x37,0xe6,0xbb,0x52,0x33,
+0x3f,0x9d,0x11,0x3e,0x88,0x80,0xd0,0x3a,0x8d,0xd0,0x97,0x24,0x3a,0xcd,0x56,0x20,
+0xe3,0xeb,0x15,0x2d,0x54,0xf6,0xd4,0x29,0x79,0x26,0xa9,0xc5,0xce,0x3b,0x68,0xc1,
+0x17,0x1d,0x2b,0xcc,0xa0,0x00,0xea,0xc8,0xa5,0x50,0xad,0xd6,0x12,0x4d,0x6c,0xd2,
+0xcb,0x6b,0x2f,0xdf,0x7c,0x76,0xee,0xdb,0xc1,0xcb,0xa1,0xe3,0x76,0xd6,0x60,0xe7,
+0xaf,0xf0,0x23,0xea,0x18,0xed,0xe2,0xee,0x1d,0xbd,0xa5,0xf0,0xaa,0xa0,0x64,0xf4,
+0x73,0x86,0x27,0xf9,0xc4,0x9b,0xe6,0xfd,0x09,0xfd,0xb8,0x89,0xbe,0xe0,0x79,0x8d,
+0x67,0xc6,0x3a,0x80,0xd0,0xdb,0xfb,0x84,0xd5,0x8b,0xbc,0x9a,0x62,0x96,0x7d,0x9e,
+0xbb,0xb0,0x3e,0x93,0x0c,0xad,0xff,0x97,0xb1,0x10,0xb0,0xaf,0x06,0x0d,0x71,0xab,
+0xdf,0x2b,0x32,0xa6,0x68,0x36,0xf3,0xa2,0x6d,0x66,0xb4,0xbc,0xda,0x7b,0x75,0xb8,
+0x03,0x5d,0x36,0xb5,0xb4,0x40,0xf7,0xb1,
diff --git a/contrib/loaders/checksum/riscv_crc.c b/contrib/loaders/checksum/riscv_crc.c
new file mode 100644
index 0000000..e437b66
--- /dev/null
+++ b/contrib/loaders/checksum/riscv_crc.c
@@ -0,0 +1,140 @@
+/*
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright (C) 2009-2021 Free Software Foundation, Inc.
+ */
+
+/* Copied from https://github.com/gcc-mirror/gcc/blob/master/libiberty/crc32.c
+ * and then tweaked a little. */
+
+/* This table was generated by the following program.
+   #include <stdio.h>
+   int
+   main ()
+   {
+     unsigned int i, j;
+     unsigned int c;
+     int table[256];
+     for (i = 0; i < 256; i++)
+       {
+	 for (c = i << 24, j = 8; j > 0; --j)
+	   c = c & 0x80000000 ? (c << 1) ^ 0x04c11db7 : (c << 1);
+	 table[i] = c;
+       }
+     printf ("static const unsigned int crc32_table[] =\n{\n");
+     for (i = 0; i < 256; i += 4)
+       {
+	 printf ("  0x%08x, 0x%08x, 0x%08x, 0x%08x",
+		 table[i + 0], table[i + 1], table[i + 2], table[i + 3]);
+	 if (i + 4 < 256)
+	   putchar (',');
+	 putchar ('\n');
+       }
+     printf ("};\n");
+     return 0;
+   }
+   For more information on CRC, see, e.g.,
+   http://www.ross.net/crc/download/crc_v3.txt.  */
+
+static const unsigned int crc32_table[] = {
+	0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9,
+	0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
+	0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61,
+	0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
+	0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,
+	0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
+	0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011,
+	0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
+	0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
+	0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
+	0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81,
+	0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
+	0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49,
+	0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
+	0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
+	0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
+	0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae,
+	0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
+	0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16,
+	0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
+	0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde,
+	0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
+	0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066,
+	0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
+	0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e,
+	0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
+	0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6,
+	0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
+	0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e,
+	0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
+	0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686,
+	0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
+	0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637,
+	0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
+	0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f,
+	0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
+	0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47,
+	0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
+	0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
+	0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
+	0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7,
+	0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
+	0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f,
+	0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
+	0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
+	0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
+	0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f,
+	0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
+	0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640,
+	0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
+	0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8,
+	0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
+	0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30,
+	0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
+	0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088,
+	0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
+	0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0,
+	0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
+	0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18,
+	0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
+	0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0,
+	0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
+	0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668,
+	0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
+};
+
+/*
+@deftypefn Extension {unsigned int} crc32 (const unsigned char *@var{buf}, @
+  int @var{len}, unsigned int @var{init})
+Compute the 32-bit CRC of @var{buf} which has length @var{len}.  The
+starting value is 0xffffffff.
+This is used by the @command{gdb} remote protocol for the @samp{qCRC}
+command.
+This CRC can be specified as:
+  Width  : 32
+  Poly   : 0x04c11db7
+  Init   : 0xffffffff
+  RefIn  : false
+  RefOut : false
+  XorOut : 0
+This differs from the "standard" CRC-32 algorithm in that the values
+are not reflected, and there is no final XOR value.  These differences
+make it easy to compose the values of multiple blocks.
+@end deftypefn
+*/
+
+#include <stdint.h>
+
+unsigned int
+xcrc32(const unsigned char *buf, int len)
+{
+	uint32_t crc = 0xffffffff;
+	while (len--) {
+		crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
+		buf++;
+	}
+	asm("mv a0, %0;"
+			"ebreak;"
+			:
+			: "r"(crc));
+	return crc;
+}
diff --git a/src/target/image.c b/src/target/image.c
index 20c6d77..e63cd0f 100644
--- a/src/target/image.c
+++ b/src/target/image.c
@@ -1052,7 +1052,7 @@ int image_calculate_checksum(const uint8_t *buffer, uint32_t nbytes, uint32_t *c
 		keep_alive();
 	}
 
-	LOG_DEBUG("Calculating checksum done");
+	LOG_DEBUG("Calculating checksum done; checksum=0x%" PRIx32, crc);
 
 	*checksum = crc;
 	return ERROR_OK;
diff --git a/src/target/riscv/riscv.c b/src/target/riscv/riscv.c
index c26e635..c883b42 100644
--- a/src/target/riscv/riscv.c
+++ b/src/target/riscv/riscv.c
@@ -1853,7 +1853,86 @@ static int riscv_checksum_memory(struct target *target,
 		target_addr_t address, uint32_t count,
 		uint32_t *checksum)
 {
-	return ERROR_FAIL;
+	struct working_area *crc_algorithm;
+	struct reg_param reg_params[2];
+	int retval;
+
+	LOG_DEBUG("address=0x%" TARGET_PRIxADDR "; count=0x%" PRIx32, address, count);
+
+	static const uint8_t riscv32_crc_code[] = {
+#include "../../contrib/loaders/checksum/riscv32_crc.inc"
+	};
+	static const uint8_t riscv64_crc_code[] = {
+#include "../../contrib/loaders/checksum/riscv64_crc.inc"
+	};
+
+	static const uint8_t *crc_code;
+
+	unsigned xlen = riscv_xlen(target);
+	unsigned crc_code_size;
+	if (xlen == 32) {
+		crc_code = riscv32_crc_code;
+		crc_code_size = sizeof(riscv32_crc_code);
+	} else {
+		crc_code = riscv64_crc_code;
+		crc_code_size = sizeof(riscv64_crc_code);
+	}
+
+	if (count < crc_code_size * 4) {
+		/* Don't use the algorithm for relatively small buffers. It's faster
+		 * just to read the memory.  target_checksum_memory() will take care of
+		 * that if we fail. */
+		return ERROR_FAIL;
+	}
+
+	retval = target_alloc_working_area(target, crc_code_size, &crc_algorithm);
+	if (retval != ERROR_OK)
+		return retval;
+
+	if (crc_algorithm->address + crc_algorithm->size > address &&
+			crc_algorithm->address < address + count) {
+		/* Region to checksum overlaps with the work area we've been assigned.
+		 * Bail. (Would be better to manually checksum what we read there, and
+		 * use the algorithm for the rest.) */
+		target_free_working_area(target, crc_algorithm);
+		return ERROR_FAIL;
+	}
+
+	retval = target_write_buffer(target, crc_algorithm->address, crc_code_size,
+			crc_code);
+	if (retval != ERROR_OK) {
+		LOG_ERROR("Failed to write code to " TARGET_ADDR_FMT ": %d",
+				crc_algorithm->address, retval);
+		target_free_working_area(target, crc_algorithm);
+		return retval;
+	}
+
+	init_reg_param(&reg_params[0], "a0", xlen, PARAM_IN_OUT);
+	init_reg_param(&reg_params[1], "a1", xlen, PARAM_OUT);
+	buf_set_u64(reg_params[0].value, 0, xlen, address);
+	buf_set_u64(reg_params[1].value, 0, xlen, count);
+
+	/* 20 second timeout/megabyte */
+	int timeout = 20000 * (1 + (count / (1024 * 1024)));
+
+	retval = target_run_algorithm(target, 0, NULL, 2, reg_params,
+			crc_algorithm->address,
+			0,	/* Leave exit point unspecified because we don't know. */
+			timeout, NULL);
+
+	if (retval == ERROR_OK)
+		*checksum = buf_get_u32(reg_params[0].value, 0, 32);
+	else
+		LOG_ERROR("error executing RISC-V CRC algorithm");
+
+	destroy_reg_param(&reg_params[0]);
+	destroy_reg_param(&reg_params[1]);
+
+	target_free_working_area(target, crc_algorithm);
+
+	LOG_DEBUG("checksum=0x%" PRIx32 ", result=%d", *checksum, retval);
+
+	return retval;
 }
 
 /*** OpenOCD Helper Functions ***/