summaryrefslogtreecommitdiffstats
path: root/plat/marvell/armada/a3k/common/dram_win.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--plat/marvell/armada/a3k/common/dram_win.c282
1 files changed, 282 insertions, 0 deletions
diff --git a/plat/marvell/armada/a3k/common/dram_win.c b/plat/marvell/armada/a3k/common/dram_win.c
new file mode 100644
index 0000000..9d7b3a9
--- /dev/null
+++ b/plat/marvell/armada/a3k/common/dram_win.c
@@ -0,0 +1,282 @@
+/*
+ * Copyright (C) 2018-2021 Marvell International Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ * https://spdx.org/licenses
+ */
+
+#include <string.h>
+
+#include <lib/mmio.h>
+
+#include <dram_win.h>
+#include <marvell_plat_priv.h>
+#include <mvebu.h>
+#include <plat_marvell.h>
+
+/* Armada 3700 has 5 configurable windows */
+#define MV_CPU_WIN_NUM 5
+
+#define CPU_WIN_DISABLED 0
+#define CPU_WIN_ENABLED 1
+
+/*
+ * There are 2 different cpu decode window configuration cases:
+ * - DRAM size is not over 2GB;
+ * - DRAM size is 4GB.
+ */
+enum cpu_win_config_num {
+ CPU_WIN_CONFIG_DRAM_NOT_OVER_2GB = 0,
+ CPU_WIN_CONFIG_DRAM_4GB,
+ CPU_WIN_CONFIG_MAX
+};
+
+enum cpu_win_target {
+ CPU_WIN_TARGET_DRAM = 0,
+ CPU_WIN_TARGET_INTERNAL_REG,
+ CPU_WIN_TARGET_PCIE,
+ CPU_WIN_TARGET_PCIE_OVER_MCI,
+ CPU_WIN_TARGET_BOOT_ROM,
+ CPU_WIN_TARGET_MCI_EXTERNAL,
+ CPU_WIN_TARGET_RWTM_RAM = 7,
+ CPU_WIN_TARGET_CCI400_REG
+};
+
+struct cpu_win_configuration {
+ uint32_t enabled;
+ enum cpu_win_target target;
+ uint64_t base_addr;
+ uint64_t size;
+ uint64_t remap_addr;
+};
+
+struct cpu_win_configuration mv_cpu_wins[CPU_WIN_CONFIG_MAX][MV_CPU_WIN_NUM] = {
+ /*
+ * When total dram size is not over 2GB:
+ * DDR window 0 is configured in tim header, its size may be not 512MB,
+ * but the actual dram size, no need to configure it again;
+ * other cpu windows are kept as default.
+ */
+ {
+ /* enabled
+ * target
+ * base
+ * size
+ * remap
+ */
+ {CPU_WIN_ENABLED,
+ CPU_WIN_TARGET_DRAM,
+ 0x0,
+ 0x08000000,
+ 0x0},
+ {CPU_WIN_ENABLED,
+ CPU_WIN_TARGET_MCI_EXTERNAL,
+ 0xe0000000,
+ 0x08000000,
+ 0xe0000000},
+ {CPU_WIN_ENABLED,
+ CPU_WIN_TARGET_PCIE,
+ 0xe8000000,
+ 0x08000000,
+ 0xe8000000},
+ {CPU_WIN_ENABLED,
+ CPU_WIN_TARGET_RWTM_RAM,
+ 0xf0000000,
+ 0x00020000,
+ 0x1fff0000},
+ {CPU_WIN_ENABLED,
+ CPU_WIN_TARGET_PCIE_OVER_MCI,
+ 0x80000000,
+ 0x10000000,
+ 0x80000000},
+ },
+
+ /*
+ * If total DRAM size is more than 2GB, now there is only one case:
+ * 4GB of DRAM; to better utilize address space (for maximization of
+ * DRAM usage), we will use the configuration of CPU windows below:
+ * - Internal Regs and Boot ROM windows are kept as default;
+ * - CCI-400 is moved from its default address to another address
+ * (this is actually done even if DRAM size is not more than 2 GB,
+ * because the firmware is compiled with that address as a
+ * constant);
+ * - PCIe window is moved to another address;
+ * - Use 4 CPU decode windows for DRAM, which cover 3.75GB DRAM;
+ * DDR window 0 is configured in tim header with 2G B size, no need
+ * to configure it again here;
+ *
+ * 0xFFFFFFFF ---> +-----------------------+
+ * | Boot ROM | 1 MB
+ * | AP Boot ROM - 16 KB: |
+ * | 0xFFFF0000-0xFFFF4000 |
+ * 0xFFF00000 ---> +-----------------------+
+ * : :
+ * 0xFE010000 ---> +-----------------------+
+ * | CCI Regs | 64 KB
+ * 0xFE000000 ---> +-----------------------+
+ * : :
+ * 0xFA000000 ---> +-----------------------+
+ * | PCIE | 128 MB
+ * 0xF2000000 ---> +-----------------------+
+ * | DDR window 3 | 512 MB
+ * 0xD2000000 ---> +-----------------------+
+ * | Internal Regs | 32 MB
+ * 0xD0000000 ---> |-----------------------|
+ * | DDR window 2 | 256 MB
+ * 0xC0000000 ---> |-----------------------|
+ * | |
+ * | DDR window 1 | 1 GB
+ * | |
+ * 0x80000000 ---> |-----------------------|
+ * | |
+ * | |
+ * | DDR window 0 | 2 GB
+ * | |
+ * | |
+ * 0x00000000 ---> +-----------------------+
+ */
+ {
+ /* win_id
+ * target
+ * base
+ * size
+ * remap
+ */
+ {CPU_WIN_ENABLED,
+ CPU_WIN_TARGET_DRAM,
+ 0x0,
+ 0x80000000,
+ 0x0},
+ {CPU_WIN_ENABLED,
+ CPU_WIN_TARGET_DRAM,
+ 0x80000000,
+ 0x40000000,
+ 0x80000000},
+ {CPU_WIN_ENABLED,
+ CPU_WIN_TARGET_DRAM,
+ 0xc0000000,
+ 0x10000000,
+ 0xc0000000},
+ {CPU_WIN_ENABLED,
+ CPU_WIN_TARGET_DRAM,
+ 0xd2000000,
+ 0x20000000,
+ 0xd2000000},
+ {CPU_WIN_ENABLED,
+ CPU_WIN_TARGET_PCIE,
+ 0xf2000000,
+ 0x08000000,
+ 0xf2000000},
+ },
+};
+
+/*
+ * dram_win_map_build
+ *
+ * This function builds cpu dram windows mapping
+ * which includes base address and window size by
+ * reading cpu dram decode windows registers.
+ *
+ * @input: N/A
+ *
+ * @output:
+ * - win_map: cpu dram windows mapping
+ *
+ * @return: N/A
+ */
+void dram_win_map_build(struct dram_win_map *win_map)
+{
+ int32_t win_id;
+ struct dram_win *win;
+ uint32_t base_reg, ctrl_reg, size_reg, enabled, target;
+
+ memset(win_map, 0, sizeof(struct dram_win_map));
+ for (win_id = 0; win_id < DRAM_WIN_MAP_NUM_MAX; win_id++) {
+ ctrl_reg = mmio_read_32(CPU_DEC_WIN_CTRL_REG(win_id));
+ target = (ctrl_reg & CPU_DEC_CR_WIN_TARGET_MASK) >>
+ CPU_DEC_CR_WIN_TARGET_OFFS;
+ enabled = ctrl_reg & CPU_DEC_CR_WIN_ENABLE;
+ /* Ignore invalid and non-dram windows*/
+ if ((enabled == 0) || (target != DRAM_CPU_DEC_TARGET_NUM))
+ continue;
+
+ win = win_map->dram_windows + win_map->dram_win_num;
+ base_reg = mmio_read_32(CPU_DEC_WIN_BASE_REG(win_id));
+ size_reg = mmio_read_32(CPU_DEC_WIN_SIZE_REG(win_id));
+ /* Base reg [15:0] corresponds to transaction address [39:16] */
+ win->base_addr = (base_reg & CPU_DEC_BR_BASE_MASK) >>
+ CPU_DEC_BR_BASE_OFFS;
+ win->base_addr *= CPU_DEC_CR_WIN_SIZE_ALIGNMENT;
+ /*
+ * Size reg [15:0] is programmed from LSB to MSB as a sequence
+ * of 1s followed by a sequence of 0s and the number of 1s
+ * specifies the size of the window in 64 KB granularity,
+ * for example, a value of 00FFh specifies 256 x 64 KB = 16 MB
+ */
+ win->win_size = (size_reg & CPU_DEC_CR_WIN_SIZE_MASK) >>
+ CPU_DEC_CR_WIN_SIZE_OFFS;
+ win->win_size = (win->win_size + 1) *
+ CPU_DEC_CR_WIN_SIZE_ALIGNMENT;
+
+ win_map->dram_win_num++;
+ }
+}
+
+static void cpu_win_set(uint32_t win_id, struct cpu_win_configuration *win_cfg)
+{
+ uint32_t base_reg, ctrl_reg, size_reg, remap_reg;
+
+ /* Disable window */
+ ctrl_reg = mmio_read_32(CPU_DEC_WIN_CTRL_REG(win_id));
+ ctrl_reg &= ~CPU_DEC_CR_WIN_ENABLE;
+ mmio_write_32(CPU_DEC_WIN_CTRL_REG(win_id), ctrl_reg);
+
+ /* For an disabled window, only disable it. */
+ if (!win_cfg->enabled)
+ return;
+
+ /* Set Base Register */
+ base_reg = (uint32_t)(win_cfg->base_addr /
+ CPU_DEC_CR_WIN_SIZE_ALIGNMENT);
+ base_reg <<= CPU_DEC_BR_BASE_OFFS;
+ base_reg &= CPU_DEC_BR_BASE_MASK;
+ mmio_write_32(CPU_DEC_WIN_BASE_REG(win_id), base_reg);
+
+ /* Set Remap Register with the same value
+ * as the <Base> field in Base Register
+ */
+ remap_reg = (uint32_t)(win_cfg->remap_addr /
+ CPU_DEC_CR_WIN_SIZE_ALIGNMENT);
+ remap_reg <<= CPU_DEC_RLR_REMAP_LOW_OFFS;
+ remap_reg &= CPU_DEC_RLR_REMAP_LOW_MASK;
+ mmio_write_32(CPU_DEC_REMAP_LOW_REG(win_id), remap_reg);
+
+ /* Set Size Register */
+ size_reg = (win_cfg->size / CPU_DEC_CR_WIN_SIZE_ALIGNMENT) - 1;
+ size_reg <<= CPU_DEC_CR_WIN_SIZE_OFFS;
+ size_reg &= CPU_DEC_CR_WIN_SIZE_MASK;
+ mmio_write_32(CPU_DEC_WIN_SIZE_REG(win_id), size_reg);
+
+ /* Set Control Register - set target id and enable window */
+ ctrl_reg &= ~CPU_DEC_CR_WIN_TARGET_MASK;
+ ctrl_reg |= (win_cfg->target << CPU_DEC_CR_WIN_TARGET_OFFS);
+ ctrl_reg |= CPU_DEC_CR_WIN_ENABLE;
+ mmio_write_32(CPU_DEC_WIN_CTRL_REG(win_id), ctrl_reg);
+}
+
+void cpu_wins_init(void)
+{
+ uint32_t cfg_idx, win_id;
+
+ if (mvebu_get_dram_size(MVEBU_REGS_BASE) <= _2GB_)
+ cfg_idx = CPU_WIN_CONFIG_DRAM_NOT_OVER_2GB;
+ else
+ cfg_idx = CPU_WIN_CONFIG_DRAM_4GB;
+
+ /* Window 0 is configured always for DRAM in tim header
+ * already, no need to configure it again here
+ */
+ for (win_id = 1; win_id < MV_CPU_WIN_NUM; win_id++)
+ cpu_win_set(win_id, &mv_cpu_wins[cfg_idx][win_id]);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-12 09:30:42 +0000