5b672d5954
Using proper symbols for base addresses, it is possible to only define the symbols for base addresses implemented for the specific platform and executing stage. Change-Id: Ib8599ee93bfb1c2d6d9b4accfca1ebbefe758e09 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/37324 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Raul Rangel <rrangel@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
65 lines
1.7 KiB
C
65 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <amdblocks/agesawrapper.h>
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#include <amdblocks/acpimmio_map.h>
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#include <console/console.h>
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#include <device/pci_def.h>
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#include <device/device.h>
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#include <device/smbus_host.h>
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#include <soc/southbridge.h>
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#include <amdblocks/dimm_spd.h>
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/*
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* readspd - Read one or more SPD bytes from a DIMM.
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* Start with offset zero and read sequentially.
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* Optimization relies on autoincrement to avoid
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* sending offset for every byte.
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* Reads 128 bytes in 7-8 ms at 400 KHz.
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*/
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static int readspd(uint8_t SmbusSlaveAddress, char *buffer, size_t count)
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{
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uint8_t dev_addr;
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size_t index;
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int error;
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char *pbuf = buffer;
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printk(BIOS_SPEW, "-------------READING SPD-----------\n");
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printk(BIOS_SPEW, "SmbusSlave: 0x%08X, count: %zd\n",
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SmbusSlaveAddress, count);
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/*
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* Convert received device address to the format accepted by
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* do_smbus_read_byte and do_smbus_recv_byte.
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*/
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dev_addr = (SmbusSlaveAddress >> 1);
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/* Read the first SPD byte */
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error = do_smbus_read_byte(ACPIMMIO_SMBUS_BASE, dev_addr, 0);
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if (error < 0) {
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printk(BIOS_ERR, "-------------SPD READ ERROR-----------\n");
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return error;
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}
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*pbuf = (char) error;
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pbuf++;
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/* Read the remaining SPD bytes using do_smbus_recv_byte for speed */
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for (index = 1 ; index < count ; index++) {
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error = do_smbus_recv_byte(ACPIMMIO_SMBUS_BASE, dev_addr);
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if (error < 0) {
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printk(BIOS_ERR, "-------------SPD READ ERROR-----------\n");
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return error;
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}
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*pbuf = (char) error;
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pbuf++;
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}
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printk(BIOS_SPEW, "\n");
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printk(BIOS_SPEW, "-------------FINISHED READING SPD-----------\n");
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return 0;
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}
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int sb_read_spd(uint8_t spdAddress, char *buf, size_t len)
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{
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return readspd(spdAddress, buf, len);
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}
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