e9665959ed
Now that the console system itself will clearly differentiate loglevels,
it is no longer necessary to explicitly add "ERROR: " in front of every
BIOS_ERR message to help it stand out more (and allow automated tooling
to grep for it). Removing all these extra .rodata characters should save
us a nice little amount of binary size.
This patch was created by running
find src/ -type f -exec perl -0777 -pi -e 's/printk\(\s*BIOS_ERR,\s*"ERROR: /printk\(BIOS_ERR, "/gi' '{}' ';'
and doing some cursory review/cleanup on the result. Then doing the same
thing for BIOS_WARN with
's/printk\(\s*BIOS_WARNING,\s*"WARN(ING)?: /printk\(BIOS_WARNING, "/gi'
Signed-off-by: Julius Werner <jwerner@chromium.org>
Change-Id: I3d0573acb23d2df53db6813cb1a5fc31b5357db8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61309
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Lance Zhao
Reviewed-by: Jason Glenesk <jason.glenesk@gmail.com>
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#include <console/console.h>
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#include <cbmem.h>
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#include <device/device.h>
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#include <device/dram/lpddr4.h>
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#include <memory_info.h>
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#include <smbios.h>
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#include <types.h>
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enum lpddr4_speed_grade {
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LPDDR4_1333,
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LPDDR4_1600,
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LPDDR4_1866,
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LPDDR4_2133,
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LPDDR4_2400,
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LPDDR4_2666,
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LPDDR4_3200,
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LPDDR4_3733,
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LPDDR4_4266,
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};
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struct lpddr4_speed_attr {
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uint32_t min_clock_mhz; // inclusive
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uint32_t max_clock_mhz; // inclusive
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uint32_t reported_mts;
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};
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/**
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* LPDDR4 speed attributes derived from JEDEC 209-4C and industry norms
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*
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* min_clock_mhz = Previous max_clock_mhz + 1
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* max_clock_mhz = 1000/min_tCk_avg(ns)
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* reported_mts = Standard reported DDR4 speed in MT/s
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* May be slightly less than the actual max MT/s
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*/
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static const struct lpddr4_speed_attr lpddr4_speeds[] = {
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[LPDDR4_1333] = {
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.min_clock_mhz = 10,
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.max_clock_mhz = 667,
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.reported_mts = 1333,
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},
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[LPDDR4_1600] = {
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.min_clock_mhz = 668,
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.max_clock_mhz = 800,
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.reported_mts = 1600
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},
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[LPDDR4_1866] = {
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.min_clock_mhz = 801,
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.max_clock_mhz = 934,
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.reported_mts = 1866,
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},
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[LPDDR4_2133] = {
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.min_clock_mhz = 935,
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.max_clock_mhz = 1067,
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.reported_mts = 2133
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},
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[LPDDR4_2400] = {
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.min_clock_mhz = 1068,
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.max_clock_mhz = 1200,
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.reported_mts = 2400
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},
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[LPDDR4_2666] = {
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.min_clock_mhz = 1201,
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.max_clock_mhz = 1333,
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.reported_mts = 2666
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},
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[LPDDR4_3200] = {
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.min_clock_mhz = 1334,
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.max_clock_mhz = 1600,
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.reported_mts = 3200
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},
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[LPDDR4_3733] = {
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.min_clock_mhz = 1601,
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.max_clock_mhz = 1867,
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.reported_mts = 3733
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},
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[LPDDR4_4266] = {
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.min_clock_mhz = 1868,
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.max_clock_mhz = 2134,
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.reported_mts = 4266
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},
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};
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/**
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* Converts LPDDR4 clock speed in MHz to the standard reported speed in MT/s
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*/
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uint16_t lpddr4_speed_mhz_to_reported_mts(uint16_t speed_mhz)
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{
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for (enum lpddr4_speed_grade speed = 0; speed < ARRAY_SIZE(lpddr4_speeds); speed++) {
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const struct lpddr4_speed_attr *speed_attr = &lpddr4_speeds[speed];
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if (speed_mhz >= speed_attr->min_clock_mhz &&
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speed_mhz <= speed_attr->max_clock_mhz) {
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return speed_attr->reported_mts;
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}
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}
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printk(BIOS_ERR, "LPDDR4 speed of %d MHz is out of range\n", speed_mhz);
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return 0;
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}
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