1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2010,2011
4 * NVIDIA Corporation <www.nvidia.com>
9 #include <efi_loader.h>
15 #include <asm/arch-tegra/ap.h>
16 #include <asm/arch-tegra/board.h>
17 #include <asm/arch-tegra/cboot.h>
18 #include <asm/arch-tegra/clk_rst.h>
19 #include <asm/arch-tegra/pmc.h>
20 #include <asm/arch-tegra/pmu.h>
21 #include <asm/arch-tegra/sys_proto.h>
22 #include <asm/arch-tegra/uart.h>
23 #include <asm/arch-tegra/warmboot.h>
24 #include <asm/arch-tegra/gpu.h>
25 #include <asm/arch-tegra/usb.h>
26 #include <asm/arch-tegra/xusb-padctl.h>
27 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
28 #include <asm/arch/clock.h>
30 #if IS_ENABLED(CONFIG_TEGRA_PINCTRL)
31 #include <asm/arch/funcmux.h>
32 #include <asm/arch/pinmux.h>
34 #include <asm/arch/tegra.h>
35 #ifdef CONFIG_TEGRA_CLOCK_SCALING
36 #include <asm/arch/emc.h>
40 DECLARE_GLOBAL_DATA_PTR;
42 #ifdef CONFIG_SPL_BUILD
44 U_BOOT_DEVICE(tegra_gpios) = {
49 __weak void pinmux_init(void) {}
50 __weak void pin_mux_usb(void) {}
51 __weak void pin_mux_spi(void) {}
52 __weak void pin_mux_mmc(void) {}
53 __weak void gpio_early_init_uart(void) {}
54 __weak void pin_mux_display(void) {}
55 __weak void start_cpu_fan(void) {}
56 __weak void cboot_late_init(void) {}
58 #if defined(CONFIG_TEGRA_NAND)
59 __weak void pin_mux_nand(void)
61 funcmux_select(PERIPH_ID_NDFLASH, FUNCMUX_DEFAULT);
66 * Routine: power_det_init
67 * Description: turn off power detects
69 static void power_det_init(void)
71 #if defined(CONFIG_TEGRA20)
72 struct pmc_ctlr *const pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
74 /* turn off power detects */
75 writel(0, &pmc->pmc_pwr_det_latch);
76 writel(0, &pmc->pmc_pwr_det);
80 __weak int tegra_board_id(void)
85 #ifdef CONFIG_DISPLAY_BOARDINFO
88 int board_id = tegra_board_id();
90 printf("Board: %s", CONFIG_TEGRA_BOARD_STRING);
92 printf(", ID: %d\n", board_id);
97 #endif /* CONFIG_DISPLAY_BOARDINFO */
99 __weak int tegra_lcd_pmic_init(int board_it)
104 __weak int nvidia_board_init(void)
110 * Routine: board_init
111 * Description: Early hardware init.
115 __maybe_unused int err;
116 __maybe_unused int board_id;
118 /* Do clocks and UART first so that printf() works */
119 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
126 #ifdef CONFIG_TEGRA_SPI
130 #ifdef CONFIG_MMC_SDHCI_TEGRA
134 /* Init is handled automatically in the driver-model case */
135 #if defined(CONFIG_DM_VIDEO)
138 /* boot param addr */
139 gd->bd->bi_boot_params = (NV_PA_SDRAM_BASE + 0x100);
143 #ifdef CONFIG_SYS_I2C_TEGRA
144 # ifdef CONFIG_TEGRA_PMU
145 if (pmu_set_nominal())
146 debug("Failed to select nominal voltages\n");
147 # ifdef CONFIG_TEGRA_CLOCK_SCALING
148 err = board_emc_init();
150 debug("Memory controller init failed: %d\n", err);
152 # endif /* CONFIG_TEGRA_PMU */
153 #endif /* CONFIG_SYS_I2C_TEGRA */
155 #ifdef CONFIG_USB_EHCI_TEGRA
159 #if defined(CONFIG_DM_VIDEO)
160 board_id = tegra_board_id();
161 err = tegra_lcd_pmic_init(board_id);
163 debug("Failed to set up LCD PMIC\n");
168 #ifdef CONFIG_TEGRA_NAND
172 tegra_xusb_padctl_init();
174 #ifdef CONFIG_TEGRA_LP0
175 /* save Sdram params to PMC 2, 4, and 24 for WB0 */
176 warmboot_save_sdram_params();
178 /* prepare the WB code to LP0 location */
179 warmboot_prepare_code(TEGRA_LP0_ADDR, TEGRA_LP0_SIZE);
181 return nvidia_board_init();
184 #ifdef CONFIG_BOARD_EARLY_INIT_F
185 static void __gpio_early_init(void)
189 void gpio_early_init(void) __attribute__((weak, alias("__gpio_early_init")));
191 int board_early_init_f(void)
193 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
194 if (!clock_early_init_done())
198 #if defined(CONFIG_TEGRA_DISCONNECT_UDC_ON_BOOT)
199 #define USBCMD_FS2 (1 << 15)
201 struct usb_ctlr *usbctlr = (struct usb_ctlr *)0x7d000000;
202 writel(USBCMD_FS2, &usbctlr->usb_cmd);
206 /* Do any special system timer/TSC setup */
207 #if IS_ENABLED(CONFIG_TEGRA_CLKRST)
208 # if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
209 if (!tegra_cpu_is_non_secure())
217 /* Initialize periph GPIOs */
219 gpio_early_init_uart();
223 #endif /* EARLY_INIT */
225 int board_late_init(void)
227 #if CONFIG_IS_ENABLED(EFI_LOADER)
228 if (gd->bd->bi_dram[1].start) {
230 * Only bank 0 is below board_get_usable_ram_top(), so all of
231 * bank 1 is not mapped by the U-Boot MMU configuration, and so
232 * we must prevent EFI from using it.
234 efi_add_memory_map(gd->bd->bi_dram[1].start,
235 gd->bd->bi_dram[1].size >> EFI_PAGE_SHIFT,
236 EFI_BOOT_SERVICES_DATA, false);
240 #if defined(CONFIG_TEGRA_SUPPORT_NON_SECURE)
241 if (tegra_cpu_is_non_secure()) {
242 printf("CPU is in NS mode\n");
243 env_set("cpu_ns_mode", "1");
245 env_set("cpu_ns_mode", "");
255 * In some SW environments, a memory carve-out exists to house a secure
256 * monitor, a trusted OS, and/or various statically allocated media buffers.
258 * This carveout exists at the highest possible address that is within a
259 * 32-bit physical address space.
261 * This function returns the total size of this carve-out. At present, the
262 * returned value is hard-coded for simplicity. In the future, it may be
263 * possible to determine the carve-out size:
264 * - By querying some run-time information source, such as:
265 * - A structure passed to U-Boot by earlier boot software.
267 * - A call into the secure monitor.
268 * - In the per-board U-Boot configuration header, based on knowledge of the
269 * SW environment that U-Boot is being built for.
271 * For now, we support two configurations in U-Boot:
272 * - 32-bit ports without any form of carve-out.
273 * - 64 bit ports which are assumed to use a carve-out of a conservatively
276 static ulong carveout_size(void)
280 #elif defined(CONFIG_ARMV7_SECURE_RESERVE_SIZE)
281 // BASE+SIZE might not == 4GB. If so, we want the carveout to cover
282 // from BASE to 4GB, not BASE to BASE+SIZE.
283 return (0 - CONFIG_ARMV7_SECURE_BASE) & ~(SZ_2M - 1);
290 * Determine the amount of usable RAM below 4GiB, taking into account any
291 * carve-out that may be assigned.
293 static ulong usable_ram_size_below_4g(void)
295 ulong total_size_below_4g;
296 ulong usable_size_below_4g;
299 * The total size of RAM below 4GiB is the lesser address of:
300 * (a) 2GiB itself (RAM starts at 2GiB, and 4GiB - 2GiB == 2GiB).
301 * (b) The size RAM physically present in the system.
303 if (gd->ram_size < SZ_2G)
304 total_size_below_4g = gd->ram_size;
306 total_size_below_4g = SZ_2G;
308 /* Calculate usable RAM by subtracting out any carve-out size */
309 usable_size_below_4g = total_size_below_4g - carveout_size();
311 return usable_size_below_4g;
315 * Represent all available RAM in either one or two banks.
317 * The first bank describes any usable RAM below 4GiB.
318 * The second bank describes any RAM above 4GiB.
320 * This split is driven by the following requirements:
321 * - The NVIDIA L4T kernel requires separate entries in the DT /memory/reg
322 * property for memory below and above the 4GiB boundary. The layout of that
323 * DT property is directly driven by the entries in the U-Boot bank array.
324 * - The potential existence of a carve-out at the end of RAM below 4GiB can
325 * only be represented using multiple banks.
327 * Explicitly removing the carve-out RAM from the bank entries makes the RAM
328 * layout a bit more obvious, e.g. when running "bdinfo" at the U-Boot
331 * This does mean that the DT U-Boot passes to the Linux kernel will not
332 * include this RAM in /memory/reg at all. An alternative would be to include
333 * all RAM in the U-Boot banks (and hence DT), and add a /memreserve/ node
334 * into DT to stop the kernel from using the RAM. IIUC, I don't /think/ the
335 * Linux kernel will ever need to access any RAM in* the carve-out via a CPU
336 * mapping, so either way is acceptable.
338 * On 32-bit systems, we never define a bank for RAM above 4GiB, since the
339 * start address of that bank cannot be represented in the 32-bit .size
342 int dram_init_banksize(void)
346 /* try to compute DRAM bank size based on cboot DTB first */
347 err = cboot_dram_init_banksize();
351 /* fall back to default DRAM bank size computation */
353 gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
354 gd->bd->bi_dram[0].size = usable_ram_size_below_4g();
357 gd->pci_ram_top = gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size;
360 #ifdef CONFIG_PHYS_64BIT
361 if (gd->ram_size > SZ_2G) {
362 gd->bd->bi_dram[1].start = 0x100000000;
363 gd->bd->bi_dram[1].size = gd->ram_size - SZ_2G;
367 gd->bd->bi_dram[1].start = 0;
368 gd->bd->bi_dram[1].size = 0;
375 * Most hardware on 64-bit Tegra is still restricted to DMA to the lower
376 * 32-bits of the physical address space. Cap the maximum usable RAM area
377 * at 4 GiB to avoid DMA buffers from being allocated beyond the 32-bit
378 * boundary that most devices can address. Also, don't let U-Boot use any
379 * carve-out, as mentioned above.
381 * This function is called before dram_init_banksize(), so we can't simply
382 * return gd->bd->bi_dram[1].start + gd->bd->bi_dram[1].size.
384 ulong board_get_usable_ram_top(ulong total_size)
388 /* try to get top of usable RAM based on cboot DTB first */
389 ram_top = cboot_get_usable_ram_top(total_size);
393 /* fall back to default usable RAM computation */
395 return CONFIG_SYS_SDRAM_BASE + usable_ram_size_below_4g();