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https://github.com/brain-hackers/u-boot-brain
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![Tom Rini](/assets/img/avatar_default.png)
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
271 lines
6.5 KiB
C
271 lines
6.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2016 Google, Inc
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*/
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#include <common.h>
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#include <dm.h>
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#include <syscon.h>
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#include <asm/cpu.h>
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#include <asm/gpio.h>
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#include <asm/intel_regs.h>
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#include <asm/mrc_common.h>
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#include <asm/pch_common.h>
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#include <asm/post.h>
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#include <asm/arch/me.h>
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#include <asm/report_platform.h>
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static const char *const ecc_decoder[] = {
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"inactive",
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"active on IO",
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"disabled on IO",
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"active"
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};
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ulong mrc_common_board_get_usable_ram_top(ulong total_size)
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{
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struct memory_info *info = &gd->arch.meminfo;
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uintptr_t dest_addr = 0;
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struct memory_area *largest = NULL;
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int i;
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/* Find largest area of memory below 4GB */
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for (i = 0; i < info->num_areas; i++) {
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struct memory_area *area = &info->area[i];
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if (area->start >= 1ULL << 32)
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continue;
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if (!largest || area->size > largest->size)
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largest = area;
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}
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/* If no suitable area was found, return an error. */
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assert(largest);
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if (!largest || largest->size < (2 << 20))
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panic("No available memory found for relocation");
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dest_addr = largest->start + largest->size;
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return (ulong)dest_addr;
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}
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void mrc_common_dram_init_banksize(void)
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{
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struct memory_info *info = &gd->arch.meminfo;
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int num_banks;
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int i;
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for (i = 0, num_banks = 0; i < info->num_areas; i++) {
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struct memory_area *area = &info->area[i];
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if (area->start >= 1ULL << 32)
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continue;
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gd->bd->bi_dram[num_banks].start = area->start;
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gd->bd->bi_dram[num_banks].size = area->size;
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num_banks++;
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}
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}
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int mrc_add_memory_area(struct memory_info *info, uint64_t start,
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uint64_t end)
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{
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struct memory_area *ptr;
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if (info->num_areas == CONFIG_NR_DRAM_BANKS)
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return -ENOSPC;
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ptr = &info->area[info->num_areas];
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ptr->start = start;
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ptr->size = end - start;
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info->total_memory += ptr->size;
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if (ptr->start < (1ULL << 32))
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info->total_32bit_memory += ptr->size;
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debug("%d: memory %llx size %llx, total now %llx / %llx\n",
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info->num_areas, ptr->start, ptr->size,
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info->total_32bit_memory, info->total_memory);
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info->num_areas++;
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return 0;
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}
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/*
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* Dump in the log memory controller configuration as read from the memory
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* controller registers.
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*/
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void report_memory_config(void)
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{
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u32 addr_decoder_common, addr_decode_ch[2];
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int i;
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addr_decoder_common = readl(MCHBAR_REG(0x5000));
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addr_decode_ch[0] = readl(MCHBAR_REG(0x5004));
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addr_decode_ch[1] = readl(MCHBAR_REG(0x5008));
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debug("memcfg DDR3 clock %d MHz\n",
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(readl(MCHBAR_REG(0x5e04)) * 13333 * 2 + 50) / 100);
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debug("memcfg channel assignment: A: %d, B % d, C % d\n",
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addr_decoder_common & 3,
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(addr_decoder_common >> 2) & 3,
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(addr_decoder_common >> 4) & 3);
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for (i = 0; i < ARRAY_SIZE(addr_decode_ch); i++) {
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u32 ch_conf = addr_decode_ch[i];
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debug("memcfg channel[%d] config (%8.8x):\n", i, ch_conf);
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debug(" ECC %s\n", ecc_decoder[(ch_conf >> 24) & 3]);
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debug(" enhanced interleave mode %s\n",
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((ch_conf >> 22) & 1) ? "on" : "off");
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debug(" rank interleave %s\n",
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((ch_conf >> 21) & 1) ? "on" : "off");
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debug(" DIMMA %d MB width x%d %s rank%s\n",
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((ch_conf >> 0) & 0xff) * 256,
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((ch_conf >> 19) & 1) ? 16 : 8,
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((ch_conf >> 17) & 1) ? "dual" : "single",
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((ch_conf >> 16) & 1) ? "" : ", selected");
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debug(" DIMMB %d MB width x%d %s rank%s\n",
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((ch_conf >> 8) & 0xff) * 256,
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((ch_conf >> 20) & 1) ? 16 : 8,
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((ch_conf >> 18) & 1) ? "dual" : "single",
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((ch_conf >> 16) & 1) ? ", selected" : "");
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}
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}
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int mrc_locate_spd(struct udevice *dev, int size, const void **spd_datap)
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{
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const void *blob = gd->fdt_blob;
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int spd_index;
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struct gpio_desc desc[4];
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int spd_node;
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int node;
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int ret;
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ret = gpio_request_list_by_name(dev, "board-id-gpios", desc,
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ARRAY_SIZE(desc), GPIOD_IS_IN);
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if (ret < 0) {
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debug("%s: gpio ret=%d\n", __func__, ret);
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return ret;
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}
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spd_index = dm_gpio_get_values_as_int(desc, ret);
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debug("spd index %d\n", spd_index);
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node = fdt_first_subnode(blob, dev_of_offset(dev));
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if (node < 0)
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return -EINVAL;
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for (spd_node = fdt_first_subnode(blob, node);
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spd_node > 0;
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spd_node = fdt_next_subnode(blob, spd_node)) {
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int len;
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if (fdtdec_get_int(blob, spd_node, "reg", -1) != spd_index)
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continue;
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*spd_datap = fdt_getprop(blob, spd_node, "data", &len);
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if (len < size) {
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printf("Missing SPD data\n");
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return -EINVAL;
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}
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debug("Using SDRAM SPD data for '%s'\n",
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fdt_get_name(blob, spd_node, NULL));
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return 0;
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}
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printf("No SPD data found for index %d\n", spd_index);
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return -ENOENT;
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}
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asmlinkage void sdram_console_tx_byte(unsigned char byte)
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{
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#ifdef DEBUG
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putc(byte);
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#endif
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}
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/**
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* Find the PEI executable in the ROM and execute it.
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*
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* @me_dev: Management Engine device
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* @pei_data: configuration data for UEFI PEI reference code
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*/
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static int sdram_initialise(struct udevice *dev, struct udevice *me_dev,
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void *pei_data, bool use_asm_linkage)
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{
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unsigned version;
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const char *data;
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report_platform_info(dev);
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debug("Starting UEFI PEI System Agent\n");
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debug("PEI data at %p:\n", pei_data);
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data = (char *)CONFIG_X86_MRC_ADDR;
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if (data) {
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int rv;
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ulong start;
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debug("Calling MRC at %p\n", data);
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post_code(POST_PRE_MRC);
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start = get_timer(0);
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if (use_asm_linkage) {
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asmlinkage int (*func)(void *);
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func = (asmlinkage int (*)(void *))data;
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rv = func(pei_data);
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} else {
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int (*func)(void *);
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func = (int (*)(void *))data;
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rv = func(pei_data);
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}
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post_code(POST_MRC);
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if (rv) {
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switch (rv) {
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case -1:
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printf("PEI version mismatch.\n");
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break;
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case -2:
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printf("Invalid memory frequency.\n");
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break;
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default:
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printf("MRC returned %x.\n", rv);
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}
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printf("Nonzero MRC return value.\n");
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return -EFAULT;
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}
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debug("MRC execution time %lu ms\n", get_timer(start));
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} else {
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printf("UEFI PEI System Agent not found.\n");
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return -ENOSYS;
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}
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version = readl(MCHBAR_REG(MCHBAR_PEI_VERSION));
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debug("System Agent Version %d.%d.%d Build %d\n",
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version >> 24 , (version >> 16) & 0xff,
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(version >> 8) & 0xff, version & 0xff);
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#if CONFIG_USBDEBUG
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/* mrc.bin reconfigures USB, so reinit it to have debug */
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early_usbdebug_init();
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#endif
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return 0;
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}
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int mrc_common_init(struct udevice *dev, void *pei_data, bool use_asm_linkage)
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{
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struct udevice *me_dev;
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int ret;
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ret = syscon_get_by_driver_data(X86_SYSCON_ME, &me_dev);
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if (ret)
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return ret;
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ret = sdram_initialise(dev, me_dev, pei_data, use_asm_linkage);
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if (ret)
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return ret;
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quick_ram_check();
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post_code(POST_DRAM);
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report_memory_config();
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return 0;
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}
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