// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016 Stefan Roese <sr@denx.de>
+ * Copyright (C) 2020 Marek Behun <marek.behun@nic.cz>
*/
#include <common.h>
#include <asm/arch/cpu.h>
#include <asm/arch/soc.h>
#include <asm/armv8/mmu.h>
+#include <sort.h>
/* Armada 3700 */
#define MVEBU_GPIO_NB_REG_BASE (MVEBU_REGISTER(0x13800))
#define MVEBU_NB_WARM_RST_REG (MVEBU_GPIO_NB_REG_BASE + 0x40)
#define MVEBU_NB_WARM_RST_MAGIC_NUM 0x1d1e
-static struct mm_region mvebu_mem_map[] = {
- {
- /* RAM */
- .phys = 0x0UL,
- .virt = 0x0UL,
- .size = 0x80000000UL,
- .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
- PTE_BLOCK_INNER_SHARE
- },
+/* Armada 3700 CPU Address Decoder registers */
+#define MVEBU_CPU_DEC_WIN_REG_BASE (size_t)(MVEBU_REGISTER(0xcf00))
+#define MVEBU_CPU_DEC_WIN_CTRL(w) \
+ (MVEBU_CPU_DEC_WIN_REG_BASE + ((w) << 4))
+#define MVEBU_CPU_DEC_WIN_CTRL_EN BIT(0)
+#define MVEBU_CPU_DEC_WIN_CTRL_TGT_MASK 0xf
+#define MVEBU_CPU_DEC_WIN_CTRL_TGT_OFFS 4
+#define MVEBU_CPU_DEC_WIN_CTRL_TGT_DRAM 0
+#define MVEBU_CPU_DEC_WIN_CTRL_TGT_PCIE 2
+#define MVEBU_CPU_DEC_WIN_SIZE(w) (MVEBU_CPU_DEC_WIN_CTRL(w) + 0x4)
+#define MVEBU_CPU_DEC_WIN_BASE(w) (MVEBU_CPU_DEC_WIN_CTRL(w) + 0x8)
+#define MVEBU_CPU_DEC_WIN_REMAP(w) (MVEBU_CPU_DEC_WIN_CTRL(w) + 0xc)
+#define MVEBU_CPU_DEC_WIN_GRANULARITY 16
+#define MVEBU_CPU_DEC_WINS 5
+
+#define MAX_MEM_MAP_REGIONS (MVEBU_CPU_DEC_WINS + 2)
+
+#define A3700_PTE_BLOCK_NORMAL \
+ (PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_INNER_SHARE)
+#define A3700_PTE_BLOCK_DEVICE \
+ (PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | PTE_BLOCK_NON_SHARE)
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static struct mm_region mvebu_mem_map[MAX_MEM_MAP_REGIONS] = {
{
- /* SRAM, MMIO regions */
- .phys = 0xd0000000UL,
- .virt = 0xd0000000UL,
+ /*
+ * SRAM, MMIO regions
+ * Don't remove this, a3700_build_mem_map needs it.
+ */
+ .phys = SOC_REGS_PHY_BASE,
+ .virt = SOC_REGS_PHY_BASE,
.size = 0x02000000UL, /* 32MiB internal registers */
- .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
- PTE_BLOCK_NON_SHARE
- },
- {
- /* PCI regions */
- .phys = 0xe8000000UL,
- .virt = 0xe8000000UL,
- .size = 0x02000000UL, /* 32MiB master PCI space */
- .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
- PTE_BLOCK_NON_SHARE
+ .attrs = A3700_PTE_BLOCK_DEVICE
},
- {
- /* List terminator */
- 0,
- }
};
struct mm_region *mem_map = mvebu_mem_map;
+static int get_cpu_dec_win(int win, u32 *tgt, u32 *base, u32 *size)
+{
+ u32 reg;
+
+ reg = readl(MVEBU_CPU_DEC_WIN_CTRL(win));
+ if (!(reg & MVEBU_CPU_DEC_WIN_CTRL_EN))
+ return -1;
+
+ if (tgt) {
+ reg >>= MVEBU_CPU_DEC_WIN_CTRL_TGT_OFFS;
+ reg &= MVEBU_CPU_DEC_WIN_CTRL_TGT_MASK;
+ *tgt = reg;
+ }
+
+ if (base) {
+ reg = readl(MVEBU_CPU_DEC_WIN_BASE(win));
+ *base = reg << MVEBU_CPU_DEC_WIN_GRANULARITY;
+ }
+
+ if (size) {
+ /*
+ * Window size is encoded as the number of 1s from LSB to MSB,
+ * followed by 0s. The number of 1s specifies the size in 64 KiB
+ * granularity.
+ */
+ reg = readl(MVEBU_CPU_DEC_WIN_SIZE(win));
+ *size = ((reg + 1) << MVEBU_CPU_DEC_WIN_GRANULARITY);
+ }
+
+ return 0;
+}
+
+/*
+ * Builds mem_map according to CPU Address Decoder settings, which were set by
+ * the TIMH image on the Cortex-M3 secure processor, or by ARM Trusted Firmware
+ */
+static void build_mem_map(void)
+{
+ int win, region;
+
+ region = 1;
+ for (win = 0; win < MVEBU_CPU_DEC_WINS; ++win) {
+ u32 base, tgt, size;
+ u64 attrs;
+
+ /* skip disabled windows */
+ if (get_cpu_dec_win(win, &tgt, &base, &size))
+ continue;
+
+ if (tgt == MVEBU_CPU_DEC_WIN_CTRL_TGT_DRAM)
+ attrs = A3700_PTE_BLOCK_NORMAL;
+ else if (tgt == MVEBU_CPU_DEC_WIN_CTRL_TGT_PCIE)
+ attrs = A3700_PTE_BLOCK_DEVICE;
+ else
+ /* skip windows with other targets */
+ continue;
+
+ mvebu_mem_map[region].phys = base;
+ mvebu_mem_map[region].virt = base;
+ mvebu_mem_map[region].size = size;
+ mvebu_mem_map[region].attrs = attrs;
+ ++region;
+ }
+
+ /* add list terminator */
+ mvebu_mem_map[region].size = 0;
+ mvebu_mem_map[region].attrs = 0;
+}
+
+void enable_caches(void)
+{
+ build_mem_map();
+
+ icache_enable();
+ dcache_enable();
+}
+
+int a3700_dram_init(void)
+{
+ int win;
+
+ gd->ram_size = 0;
+ for (win = 0; win < MVEBU_CPU_DEC_WINS; ++win) {
+ u32 base, tgt, size;
+
+ /* skip disabled windows */
+ if (get_cpu_dec_win(win, &tgt, &base, &size))
+ continue;
+
+ /* skip non-DRAM windows */
+ if (tgt != MVEBU_CPU_DEC_WIN_CTRL_TGT_DRAM)
+ continue;
+
+ /*
+ * It is possible that one image was built for boards with
+ * different RAM sizes, for example 512 MiB and 1 GiB.
+ * We therefore try to determine the actual RAM size in the
+ * window with get_ram_size.
+ */
+ gd->ram_size += get_ram_size((void *)(size_t)base, size);
+ }
+
+ return 0;
+}
+
+struct a3700_dram_window {
+ size_t base, size;
+};
+
+static int dram_win_cmp(const void *a, const void *b)
+{
+ size_t ab, bb;
+
+ ab = ((const struct a3700_dram_window *)a)->base;
+ bb = ((const struct a3700_dram_window *)b)->base;
+
+ if (ab < bb)
+ return -1;
+ else if (ab > bb)
+ return 1;
+ else
+ return 0;
+}
+
+int a3700_dram_init_banksize(void)
+{
+ struct a3700_dram_window dram_wins[MVEBU_CPU_DEC_WINS];
+ int bank, win, ndram_wins;
+ u32 last_end;
+ size_t size;
+
+ ndram_wins = 0;
+ for (win = 0; win < MVEBU_CPU_DEC_WINS; ++win) {
+ u32 base, tgt, size;
+
+ /* skip disabled windows */
+ if (get_cpu_dec_win(win, &tgt, &base, &size))
+ continue;
+
+ /* skip non-DRAM windows */
+ if (tgt != MVEBU_CPU_DEC_WIN_CTRL_TGT_DRAM)
+ continue;
+
+ dram_wins[win].base = base;
+ dram_wins[win].size = size;
+ ++ndram_wins;
+ }
+
+ qsort(dram_wins, ndram_wins, sizeof(dram_wins[0]), dram_win_cmp);
+
+ bank = 0;
+ last_end = -1;
+
+ for (win = 0; win < ndram_wins; ++win) {
+ /* again determining actual RAM size as in a3700_dram_init */
+ size = get_ram_size((void *)dram_wins[win].base,
+ dram_wins[win].size);
+
+ /*
+ * Check if previous window ends as the current starts. If yes,
+ * merge these windows into one "bank". This is possible by this
+ * simple check thanks to mem_map regions being qsorted in
+ * build_mem_map.
+ */
+ if (last_end == dram_wins[win].base) {
+ gd->bd->bi_dram[bank - 1].size += size;
+ last_end += size;
+ } else {
+ if (bank == CONFIG_NR_DRAM_BANKS) {
+ printf("Need more CONFIG_NR_DRAM_BANKS\n");
+ return -ENOBUFS;
+ }
+
+ gd->bd->bi_dram[bank].start = dram_wins[win].base;
+ gd->bd->bi_dram[bank].size = size;
+ last_end = dram_wins[win].base + size;
+ ++bank;
+ }
+ }
+
+ /*
+ * If there is more place for DRAM BANKS definitions than needed, fill
+ * the rest with zeros.
+ */
+ for (; bank < CONFIG_NR_DRAM_BANKS; ++bank) {
+ gd->bd->bi_dram[bank].start = 0;
+ gd->bd->bi_dram[bank].size = 0;
+ }
+
+ return 0;
+}
+
void reset_cpu(ulong ignored)
{
/*
projects / oweals / u-boot.git / commitdiff