diff options
Diffstat (limited to 'arch/arm/mach-tegra')
| -rw-r--r-- | arch/arm/mach-tegra/Kconfig | 15 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/Makefile | 14 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/arm64-mmu.c | 6 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/board186.c | 18 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/board2.c | 26 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/clock.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/cpu.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/dt-setup.c | 34 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/ivc.c | 553 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/psci.S | 16 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/tegra186/Makefile | 5 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/tegra186/nvtboot_ll.S | 20 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/tegra186/nvtboot_mem.c | 88 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/tegra20/Makefile | 3 |
14 files changed, 737 insertions, 65 deletions
diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig index f4affa5512..1eaf406272 100644 --- a/arch/arm/mach-tegra/Kconfig +++ b/arch/arm/mach-tegra/Kconfig @@ -1,5 +1,13 @@ if TEGRA +config TEGRA_IVC + bool "Tegra IVC protocol" + help + IVC (Inter-VM Communication) protocol is a Tegra-specific IPC + (Inter Processor Communication) framework. Within the context of + U-Boot, it is typically used for communication between the main CPU + and various auxiliary processors. + config TEGRA_COMMON bool "Tegra common options" select DM @@ -56,10 +64,17 @@ config TEGRA210 config TEGRA186 bool "Tegra186 family" + select CLK select DM_MAILBOX + select DM_RESET + select MISC + select TEGRA186_BPMP + select TEGRA186_CLOCK select TEGRA186_GPIO + select TEGRA186_RESET select TEGRA_ARMV8_COMMON select TEGRA_HSP + select TEGRA_IVC endchoice diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile index 12ee1cd749..b978fec075 100644 --- a/arch/arm/mach-tegra/Makefile +++ b/arch/arm/mach-tegra/Makefile @@ -15,23 +15,25 @@ else obj-$(CONFIG_CMD_ENTERRCM) += cmd_enterrcm.o endif -obj-$(CONFIG_ARM64) += arm64-mmu.o obj-y += ap.o obj-y += board.o board2.o obj-y += cache.o obj-y += clock.o -obj-y += lowlevel_init.o obj-y += pinmux-common.o obj-y += powergate.o obj-y += xusb-padctl-dummy.o -obj-$(CONFIG_DISPLAY_CPUINFO) += sys_info.o -obj-$(CONFIG_TEGRA_GPU) += gpu.o -obj-$(CONFIG_TEGRA_CLOCK_SCALING) += emc.o +endif +obj-$(CONFIG_ARM64) += arm64-mmu.o +obj-y += dt-setup.o +obj-$(CONFIG_TEGRA_CLOCK_SCALING) += emc.o +obj-$(CONFIG_TEGRA_GPU) += gpu.o +obj-$(CONFIG_TEGRA_IVC) += ivc.o +obj-y += lowlevel_init.o ifndef CONFIG_SPL_BUILD obj-$(CONFIG_ARMV7_PSCI) += psci.o endif -endif +obj-$(CONFIG_DISPLAY_CPUINFO) += sys_info.o obj-$(CONFIG_TEGRA20) += tegra20/ obj-$(CONFIG_TEGRA30) += tegra30/ diff --git a/arch/arm/mach-tegra/arm64-mmu.c b/arch/arm/mach-tegra/arm64-mmu.c index 501c4f00c4..7b1d258ed8 100644 --- a/arch/arm/mach-tegra/arm64-mmu.c +++ b/arch/arm/mach-tegra/arm64-mmu.c @@ -14,13 +14,15 @@ static struct mm_region tegra_mem_map[] = { { - .base = 0x0UL, + .virt = 0x0UL, + .phys = 0x0UL, .size = 0x80000000UL, .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) | PTE_BLOCK_NON_SHARE | PTE_BLOCK_PXN | PTE_BLOCK_UXN }, { - .base = 0x80000000UL, + .virt = 0x80000000UL, + .phys = 0x80000000UL, .size = 0xff80000000UL, .attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) | PTE_BLOCK_INNER_SHARE diff --git a/arch/arm/mach-tegra/board186.c b/arch/arm/mach-tegra/board186.c index f4b6152a79..1b9799fd80 100644 --- a/arch/arm/mach-tegra/board186.c +++ b/arch/arm/mach-tegra/board186.c @@ -11,20 +11,19 @@ DECLARE_GLOBAL_DATA_PTR; -int dram_init(void) +int board_early_init_f(void) { - gd->ram_size = (1.5 * 1024 * 1024 * 1024); return 0; } -int board_early_init_f(void) +__weak int tegra_board_init(void) { return 0; } int board_init(void) { - return 0; + return tegra_board_init(); } int board_late_init(void) @@ -32,12 +31,6 @@ int board_late_init(void) return 0; } -void dram_init_banksize(void) -{ - gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE; - gd->bd->bi_dram[0].size = gd->ram_size; -} - void pad_init_mmc(struct mmc_host *host) { } @@ -48,8 +41,3 @@ int board_mmc_init(bd_t *bd) return 0; } - -int ft_system_setup(void *blob, bd_t *bd) -{ - return 0; -} diff --git a/arch/arm/mach-tegra/board2.c b/arch/arm/mach-tegra/board2.c index 141d6e1cb5..9158ace44c 100644 --- a/arch/arm/mach-tegra/board2.c +++ b/arch/arm/mach-tegra/board2.c @@ -397,29 +397,3 @@ ulong board_get_usable_ram_top(ulong total_size) { return CONFIG_SYS_SDRAM_BASE + usable_ram_size_below_4g(); } - -/* - * This function is called right before the kernel is booted. "blob" is the - * device tree that will be passed to the kernel. - */ -int ft_system_setup(void *blob, bd_t *bd) -{ - const char *gpu_compats[] = { -#if defined(CONFIG_TEGRA124) - "nvidia,gk20a", -#endif -#if defined(CONFIG_TEGRA210) - "nvidia,gm20b", -#endif - }; - int i, ret; - - /* Enable GPU node if GPU setup has been performed */ - for (i = 0; i < ARRAY_SIZE(gpu_compats); i++) { - ret = tegra_gpu_enable_node(blob, gpu_compats[i]); - if (ret) - return ret; - } - - return 0; -} diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c index c50d56dc88..36eabc8f57 100644 --- a/arch/arm/mach-tegra/clock.c +++ b/arch/arm/mach-tegra/clock.c @@ -510,7 +510,7 @@ unsigned clock_get_rate(enum clock_id clkid) * @param p post divider(DIVP) * @param cpcon base PLL charge pump(CPCON) * @return 0 if ok, -1 on error (the requested PLL is incorrect and cannot - * be overriden), 1 if PLL is already correct + * be overridden), 1 if PLL is already correct */ int clock_set_rate(enum clock_id clkid, u32 n, u32 m, u32 p, u32 cpcon) { diff --git a/arch/arm/mach-tegra/cpu.h b/arch/arm/mach-tegra/cpu.h index 3f38969a44..1154f8b37e 100644 --- a/arch/arm/mach-tegra/cpu.h +++ b/arch/arm/mach-tegra/cpu.h @@ -16,7 +16,7 @@ #elif defined(CONFIG_TEGRA30) || defined(CONFIG_TEGRA114) || \ defined(CONFIG_TEGRA124) || defined(CONFIG_TEGRA210) #define NVBL_PLLP_KHZ 408000 -#define CSITE_KHZ 204000 +#define CSITE_KHZ 136000 #else #error "Unknown Tegra chip!" #endif diff --git a/arch/arm/mach-tegra/dt-setup.c b/arch/arm/mach-tegra/dt-setup.c new file mode 100644 index 0000000000..f44d9cb04d --- /dev/null +++ b/arch/arm/mach-tegra/dt-setup.c @@ -0,0 +1,34 @@ +/* + * Copyright (c) 2010-2016, NVIDIA CORPORATION. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/arch-tegra/gpu.h> + +/* + * This function is called right before the kernel is booted. "blob" is the + * device tree that will be passed to the kernel. + */ +int ft_system_setup(void *blob, bd_t *bd) +{ + const char *gpu_compats[] = { +#if defined(CONFIG_TEGRA124) + "nvidia,gk20a", +#endif +#if defined(CONFIG_TEGRA210) + "nvidia,gm20b", +#endif + }; + int i, ret; + + /* Enable GPU node if GPU setup has been performed */ + for (i = 0; i < ARRAY_SIZE(gpu_compats); i++) { + ret = tegra_gpu_enable_node(blob, gpu_compats[i]); + if (ret) + return ret; + } + + return 0; +} diff --git a/arch/arm/mach-tegra/ivc.c b/arch/arm/mach-tegra/ivc.c new file mode 100644 index 0000000000..cf6626fb12 --- /dev/null +++ b/arch/arm/mach-tegra/ivc.c @@ -0,0 +1,553 @@ +/* + * Copyright (c) 2016, NVIDIA CORPORATION. + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch-tegra/ivc.h> + +#define TEGRA_IVC_ALIGN 64 + +/* + * IVC channel reset protocol. + * + * Each end uses its tx_channel.state to indicate its synchronization state. + */ +enum ivc_state { + /* + * This value is zero for backwards compatibility with services that + * assume channels to be initially zeroed. Such channels are in an + * initially valid state, but cannot be asynchronously reset, and must + * maintain a valid state at all times. + * + * The transmitting end can enter the established state from the sync or + * ack state when it observes the receiving endpoint in the ack or + * established state, indicating that has cleared the counters in our + * rx_channel. + */ + ivc_state_established = 0, + + /* + * If an endpoint is observed in the sync state, the remote endpoint is + * allowed to clear the counters it owns asynchronously with respect to + * the current endpoint. Therefore, the current endpoint is no longer + * allowed to communicate. + */ + ivc_state_sync, + + /* + * When the transmitting end observes the receiving end in the sync + * state, it can clear the w_count and r_count and transition to the ack + * state. If the remote endpoint observes us in the ack state, it can + * return to the established state once it has cleared its counters. + */ + ivc_state_ack +}; + +/* + * This structure is divided into two-cache aligned parts, the first is only + * written through the tx_channel pointer, while the second is only written + * through the rx_channel pointer. This delineates ownership of the cache lines, + * which is critical to performance and necessary in non-cache coherent + * implementations. + */ +struct tegra_ivc_channel_header { + union { + /* fields owned by the transmitting end */ + struct { + uint32_t w_count; + uint32_t state; + }; + uint8_t w_align[TEGRA_IVC_ALIGN]; + }; + union { + /* fields owned by the receiving end */ + uint32_t r_count; + uint8_t r_align[TEGRA_IVC_ALIGN]; + }; +}; + +static inline void tegra_ivc_invalidate_counter(struct tegra_ivc *ivc, + struct tegra_ivc_channel_header *h, + ulong offset) +{ + ulong base = ((ulong)h) + offset; + invalidate_dcache_range(base, base + TEGRA_IVC_ALIGN); +} + +static inline void tegra_ivc_flush_counter(struct tegra_ivc *ivc, + struct tegra_ivc_channel_header *h, + ulong offset) +{ + ulong base = ((ulong)h) + offset; + flush_dcache_range(base, base + TEGRA_IVC_ALIGN); +} + +static inline ulong tegra_ivc_frame_addr(struct tegra_ivc *ivc, + struct tegra_ivc_channel_header *h, + uint32_t frame) +{ + BUG_ON(frame >= ivc->nframes); + + return ((ulong)h) + sizeof(struct tegra_ivc_channel_header) + + (ivc->frame_size * frame); +} + +static inline void *tegra_ivc_frame_pointer(struct tegra_ivc *ivc, + struct tegra_ivc_channel_header *ch, + uint32_t frame) +{ + return (void *)tegra_ivc_frame_addr(ivc, ch, frame); +} + +static inline void tegra_ivc_invalidate_frame(struct tegra_ivc *ivc, + struct tegra_ivc_channel_header *h, + unsigned frame) +{ + ulong base = tegra_ivc_frame_addr(ivc, h, frame); + invalidate_dcache_range(base, base + ivc->frame_size); +} + +static inline void tegra_ivc_flush_frame(struct tegra_ivc *ivc, + struct tegra_ivc_channel_header *h, + unsigned frame) +{ + ulong base = tegra_ivc_frame_addr(ivc, h, frame); + flush_dcache_range(base, base + ivc->frame_size); +} + +static inline int tegra_ivc_channel_empty(struct tegra_ivc *ivc, + struct tegra_ivc_channel_header *ch) +{ + /* + * This function performs multiple checks on the same values with + * security implications, so create snapshots with ACCESS_ONCE() to + * ensure that these checks use the same values. + */ + uint32_t w_count = ACCESS_ONCE(ch->w_count); + uint32_t r_count = ACCESS_ONCE(ch->r_count); + + /* + * Perform an over-full check to prevent denial of service attacks where + * a server could be easily fooled into believing that there's an + * extremely large number of frames ready, since receivers are not + * expected to check for full or over-full conditions. + * + * Although the channel isn't empty, this is an invalid case caused by + * a potentially malicious peer, so returning empty is safer, because it + * gives the impression that the channel has gone silent. + */ + if (w_count - r_count > ivc->nframes) + return 1; + + return w_count == r_count; +} + +static inline int tegra_ivc_channel_full(struct tegra_ivc *ivc, + struct tegra_ivc_channel_header *ch) +{ + /* + * Invalid cases where the counters indicate that the queue is over + * capacity also appear full. + */ + return (ACCESS_ONCE(ch->w_count) - ACCESS_ONCE(ch->r_count)) >= + ivc->nframes; +} + +static inline void tegra_ivc_advance_rx(struct tegra_ivc *ivc) +{ + ACCESS_ONCE(ivc->rx_channel->r_count) = + ACCESS_ONCE(ivc->rx_channel->r_count) + 1; + + if (ivc->r_pos == ivc->nframes - 1) + ivc->r_pos = 0; + else + ivc->r_pos++; +} + +static inline void tegra_ivc_advance_tx(struct tegra_ivc *ivc) +{ + ACCESS_ONCE(ivc->tx_channel->w_count) = + ACCESS_ONCE(ivc->tx_channel->w_count) + 1; + + if (ivc->w_pos == ivc->nframes - 1) + ivc->w_pos = 0; + else + ivc->w_pos++; +} + +static inline int tegra_ivc_check_read(struct tegra_ivc *ivc) +{ + ulong offset; + + /* + * tx_channel->state is set locally, so it is not synchronized with + * state from the remote peer. The remote peer cannot reset its + * transmit counters until we've acknowledged its synchronization + * request, so no additional synchronization is required because an + * asynchronous transition of rx_channel->state to ivc_state_ack is not + * allowed. + */ + if (ivc->tx_channel->state != ivc_state_established) + return -ECONNRESET; + + /* + * Avoid unnecessary invalidations when performing repeated accesses to + * an IVC channel by checking the old queue pointers first. + * Synchronization is only necessary when these pointers indicate empty + * or full. + */ + if (!tegra_ivc_channel_empty(ivc, ivc->rx_channel)) + return 0; + + offset = offsetof(struct tegra_ivc_channel_header, w_count); + tegra_ivc_invalidate_counter(ivc, ivc->rx_channel, offset); + return tegra_ivc_channel_empty(ivc, ivc->rx_channel) ? -ENOMEM : 0; +} + +static inline int tegra_ivc_check_write(struct tegra_ivc *ivc) +{ + ulong offset; + + if (ivc->tx_channel->state != ivc_state_established) + return -ECONNRESET; + + if (!tegra_ivc_channel_full(ivc, ivc->tx_channel)) + return 0; + + offset = offsetof(struct tegra_ivc_channel_header, r_count); + tegra_ivc_invalidate_counter(ivc, ivc->tx_channel, offset); + return tegra_ivc_channel_full(ivc, ivc->tx_channel) ? -ENOMEM : 0; +} + +static inline uint32_t tegra_ivc_channel_avail_count(struct tegra_ivc *ivc, + struct tegra_ivc_channel_header *ch) +{ + /* + * This function isn't expected to be used in scenarios where an + * over-full situation can lead to denial of service attacks. See the + * comment in tegra_ivc_channel_empty() for an explanation about + * special over-full considerations. + */ + return ACCESS_ONCE(ch->w_count) - ACCESS_ONCE(ch->r_count); +} + +int tegra_ivc_read_get_next_frame(struct tegra_ivc *ivc, void **frame) +{ + int result = tegra_ivc_check_read(ivc); + if (result < 0) + return result; + + /* + * Order observation of w_pos potentially indicating new data before + * data read. + */ + mb(); + + tegra_ivc_invalidate_frame(ivc, ivc->rx_channel, ivc->r_pos); + *frame = tegra_ivc_frame_pointer(ivc, ivc->rx_channel, ivc->r_pos); + + return 0; +} + +int tegra_ivc_read_advance(struct tegra_ivc *ivc) +{ + ulong offset; + int result; + + /* + * No read barriers or synchronization here: the caller is expected to + * have already observed the channel non-empty. This check is just to + * catch programming errors. + */ + result = tegra_ivc_check_read(ivc); + if (result) + return result; + + tegra_ivc_advance_rx(ivc); + offset = offsetof(struct tegra_ivc_channel_header, r_count); + tegra_ivc_flush_counter(ivc, ivc->rx_channel, offset); + + /* + * Ensure our write to r_pos occurs before our read from w_pos. + */ + mb(); + + offset = offsetof(struct tegra_ivc_channel_header, w_count); + tegra_ivc_invalidate_counter(ivc, ivc->rx_channel, offset); + + if (tegra_ivc_channel_avail_count(ivc, ivc->rx_channel) == + ivc->nframes - 1) + ivc->notify(ivc); + + return 0; +} + +int tegra_ivc_write_get_next_frame(struct tegra_ivc *ivc, void **frame) +{ + int result = tegra_ivc_check_write(ivc); + if (result) + return result; + + *frame = tegra_ivc_frame_pointer(ivc, ivc->tx_channel, ivc->w_pos); + + return 0; +} + +int tegra_ivc_write_advance(struct tegra_ivc *ivc) +{ + ulong offset; + int result; + + result = tegra_ivc_check_write(ivc); + if (result) + return result; + + tegra_ivc_flush_frame(ivc, ivc->tx_channel, ivc->w_pos); + + /* + * Order any possible stores to the frame before update of w_pos. + */ + mb(); + + tegra_ivc_advance_tx(ivc); + offset = offsetof(struct tegra_ivc_channel_header, w_count); + tegra_ivc_flush_counter(ivc, ivc->tx_channel, offset); + + /* + * Ensure our write to w_pos occurs before our read from r_pos. + */ + mb(); + + offset = offsetof(struct tegra_ivc_channel_header, r_count); + tegra_ivc_invalidate_counter(ivc, ivc->tx_channel, offset); + + if (tegra_ivc_channel_avail_count(ivc, ivc->tx_channel) == 1) + ivc->notify(ivc); + + return 0; +} + +/* + * =============================================================== + * IVC State Transition Table - see tegra_ivc_channel_notified() + * =============================================================== + * + * local remote action + * ----- ------ ----------------------------------- + * SYNC EST <none> + * SYNC ACK reset counters; move to EST; notify + * SYNC SYNC reset counters; move to ACK; notify + * ACK EST move to EST; notify + * ACK ACK move to EST; notify + * ACK SYNC reset counters; move to ACK; notify + * EST EST <none> + * EST ACK <none> + * EST SYNC reset counters; move to ACK; notify + * + * =============================================================== + */ +int tegra_ivc_channel_notified(struct tegra_ivc *ivc) +{ + ulong offset; + enum ivc_state peer_state; + + /* Copy the receiver's state out of shared memory. */ + offset = offsetof(struct tegra_ivc_channel_header, w_count); + tegra_ivc_invalidate_counter(ivc, ivc->rx_channel, offset); + peer_state = ACCESS_ONCE(ivc->rx_channel->state); + + if (peer_state == ivc_state_sync) { + /* + * Order observation of ivc_state_sync before stores clearing + * tx_channel. + */ + mb(); + + /* + * Reset tx_channel counters. The remote end is in the SYNC + * state and won't make progress until we change our state, + * so the counters are not in use at this time. + */ + ivc->tx_channel->w_count = 0; + ivc->rx_channel->r_count = 0; + + ivc->w_pos = 0; + ivc->r_pos = 0; + + /* + * Ensure that counters appear cleared before new state can be + * observed. + */ + mb(); + + /* + * Move to ACK state. We have just cleared our counters, so it + * is now safe for the remote end to start using these values. + */ + ivc->tx_channel->state = ivc_state_ack; + offset = offsetof(struct tegra_ivc_channel_header, w_count); + tegra_ivc_flush_counter(ivc, ivc->tx_channel, offset); + + /* + * Notify remote end to observe state transition. + */ + ivc->notify(ivc); + } else if (ivc->tx_channel->state == ivc_state_sync && + peer_state == ivc_state_ack) { + /* + * Order observation of ivc_state_sync before stores clearing + * tx_channel. + */ + mb(); + + /* + * Reset tx_channel counters. The remote end is in the ACK + * state and won't make progress until we change our state, + * so the counters are not in use at this time. + */ + ivc->tx_channel->w_count = 0; + ivc->rx_channel->r_count = 0; + + ivc->w_pos = 0; + ivc->r_pos = 0; + + /* + * Ensure that counters appear cleared before new state can be + * observed. + */ + mb(); + + /* + * Move to ESTABLISHED state. We know that the remote end has + * already cleared its counters, so it is safe to start + * writing/reading on this channel. + */ + ivc->tx_channel->state = ivc_state_established; + offset = offsetof(struct tegra_ivc_channel_header, w_count); + tegra_ivc_flush_counter(ivc, ivc->tx_channel, offset); + + /* + * Notify remote end to observe state transition. + */ + ivc->notify(ivc); + } else if (ivc->tx_channel->state == ivc_state_ack) { + /* + * At this point, we have observed the peer to be in either + * the ACK or ESTABLISHED state. Next, order observation of + * peer state before storing to tx_channel. + */ + mb(); + + /* + * Move to ESTABLISHED state. We know that we have previously + * cleared our counters, and we know that the remote end has + * cleared its counters, so it is safe to start writing/reading + * on this channel. + */ + ivc->tx_channel->state = ivc_state_established; + offset = offsetof(struct tegra_ivc_channel_header, w_count); + tegra_ivc_flush_counter(ivc, ivc->tx_channel, offset); + + /* + * Notify remote end to observe state transition. + */ + ivc->notify(ivc); + } else { + /* + * There is no need to handle any further action. Either the + * channel is already fully established, or we are waiting for + * the remote end to catch up with our current state. Refer + * to the diagram in "IVC State Transition Table" above. + */ + } + + if (ivc->tx_channel->state != ivc_state_established) + return -EAGAIN; + + return 0; +} + +void tegra_ivc_channel_reset(struct tegra_ivc *ivc) +{ + ulong offset; + + ivc->tx_channel->state = ivc_state_sync; + offset = offsetof(struct tegra_ivc_channel_header, w_count); + tegra_ivc_flush_counter(ivc, ivc->tx_channel, offset); + ivc->notify(ivc); +} + +static int check_ivc_params(ulong qbase1, ulong qbase2, uint32_t nframes, + uint32_t frame_size) +{ + int ret = 0; + + BUG_ON(offsetof(struct tegra_ivc_channel_header, w_count) & + (TEGRA_IVC_ALIGN - 1)); + BUG_ON(offsetof(struct tegra_ivc_channel_header, r_count) & + (TEGRA_IVC_ALIGN - 1)); + BUG_ON(sizeof(struct tegra_ivc_channel_header) & + (TEGRA_IVC_ALIGN - 1)); + + if ((uint64_t)nframes * (uint64_t)frame_size >= 0x100000000) { + error("tegra_ivc: nframes * frame_size overflows\n"); + return -EINVAL; + } + + /* + * The headers must at least be aligned enough for counters + * to be accessed atomically. + */ + if ((qbase1 & (TEGRA_IVC_ALIGN - 1)) || + (qbase2 & (TEGRA_IVC_ALIGN - 1))) { + error("tegra_ivc: channel start not aligned\n"); + return -EINVAL; + } + + if (frame_size & (TEGRA_IVC_ALIGN - 1)) { + error("tegra_ivc: frame size not adequately aligned\n"); + return -EINVAL; + } + + if (qbase1 < qbase2) { + if (qbase1 + frame_size * nframes > qbase2) + ret = -EINVAL; + } else { + if (qbase2 + frame_size * nframes > qbase1) + ret = -EINVAL; + } + + if (ret) { + error("tegra_ivc: queue regions overlap\n"); + return ret; + } + + return 0; +} + +int tegra_ivc_init(struct tegra_ivc *ivc, ulong rx_base, ulong tx_base, + uint32_t nframes, uint32_t frame_size, + void (*notify)(struct tegra_ivc *)) +{ + int ret; + + if (!ivc) + return -EINVAL; + + ret = check_ivc_params(rx_base, tx_base, nframes, frame_size); + if (ret) + return ret; + + ivc->rx_channel = (struct tegra_ivc_channel_header *)rx_base; + ivc->tx_channel = (struct tegra_ivc_channel_header *)tx_base; + ivc->w_pos = 0; + ivc->r_pos = 0; + ivc->nframes = nframes; + ivc->frame_size = frame_size; + ivc->notify = notify; + + return 0; +} diff --git a/arch/arm/mach-tegra/psci.S b/arch/arm/mach-tegra/psci.S index b836da1c0e..645d08fa0b 100644 --- a/arch/arm/mach-tegra/psci.S +++ b/arch/arm/mach-tegra/psci.S @@ -61,9 +61,6 @@ ENTRY(psci_arch_init) ldrne r7, [r5] mcrne p15, 0, r7, c14, c0, 0 @ write CNTFRQ to CPU1..3 - bl psci_get_cpu_stack_top @ stack top => r0 - mov sp, r0 - bx r6 ENDPROC(psci_arch_init) @@ -88,12 +85,13 @@ _loop: wfi ENDPROC(psci_cpu_off) ENTRY(psci_cpu_on) - push {lr} + push {r4, r5, r6, lr} + mov r4, r1 mov r0, r1 - bl psci_get_cpu_stack_top @ get stack top of target CPU - str r2, [r0] @ store target PC at stack top - dsb + mov r1, r2 + bl psci_save_target_pc @ store target PC + mov r1, r4 ldr r6, =TEGRA_RESET_EXCEPTION_VECTOR ldr r5, =psci_cpu_entry @@ -106,9 +104,7 @@ ENTRY(psci_cpu_on) str r5, [r6, r2] mov r0, #ARM_PSCI_RET_SUCCESS @ Return PSCI_RET_SUCCESS - pop {pc} + pop {r4, r5, r6, pc} ENDPROC(psci_cpu_on) - .globl psci_text_end -psci_text_end: .popsection diff --git a/arch/arm/mach-tegra/tegra186/Makefile b/arch/arm/mach-tegra/tegra186/Makefile index ce4610d8f8..033d6005fb 100644 --- a/arch/arm/mach-tegra/tegra186/Makefile +++ b/arch/arm/mach-tegra/tegra186/Makefile @@ -2,7 +2,6 @@ # # SPDX-License-Identifier: GPL-2.0 -obj-y += ../arm64-mmu.o obj-y += ../board186.o -obj-y += ../lowlevel_init.o -obj-$(CONFIG_DISPLAY_CPUINFO) += ../sys_info.o +obj-y += nvtboot_ll.o +obj-y += nvtboot_mem.o diff --git a/arch/arm/mach-tegra/tegra186/nvtboot_ll.S b/arch/arm/mach-tegra/tegra186/nvtboot_ll.S new file mode 100644 index 0000000000..1eab890958 --- /dev/null +++ b/arch/arm/mach-tegra/tegra186/nvtboot_ll.S @@ -0,0 +1,20 @@ +/* + * Save nvtboot-related boot-time CPU state + * + * (C) Copyright 2015-2016 NVIDIA Corporation <www.nvidia.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> +#include <linux/linkage.h> + +.globl nvtboot_boot_x0 +nvtboot_boot_x0: + .dword 0 + +ENTRY(save_boot_params) + adr x8, nvtboot_boot_x0 + str x0, [x8] + b save_boot_params_ret +ENDPROC(save_boot_params) diff --git a/arch/arm/mach-tegra/tegra186/nvtboot_mem.c b/arch/arm/mach-tegra/tegra186/nvtboot_mem.c new file mode 100644 index 0000000000..37dd8d4334 --- /dev/null +++ b/arch/arm/mach-tegra/tegra186/nvtboot_mem.c @@ -0,0 +1,88 @@ +/* + * Copyright (c) 2016, NVIDIA CORPORATION. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <fdt_support.h> +#include <fdtdec.h> +#include <asm/arch/tegra.h> + +DECLARE_GLOBAL_DATA_PTR; + +extern unsigned long nvtboot_boot_x0; + +/* + * A parsed version of /memory/reg from the DTB that is passed to U-Boot in x0. + * + * We only support up to two banks since that's all the binary bootloader + * ever sets. We assume bank 0 is RAM below 4G and bank 1 is RAM above 4G. + * This is all a fairly safe assumption, since the L4T kernel makes the same + * assumptions, so the bootloader is unlikely to change. + * + * This is written to before relocation, and hence cannot be in .bss, since + * .bss overlaps the DTB that's appended to the U-Boot binary. The initializer + * forces this into .data and avoids this issue. This also has the nice side- + * effect of the content being valid after relocation. + */ +static struct { + u64 start; + u64 size; +} ram_banks[2] = {{1}}; + +int dram_init(void) +{ + unsigned int na, ns; + const void *nvtboot_blob = (void *)nvtboot_boot_x0; + int node, len, i; + const u32 *prop; + + memset(ram_banks, 0, sizeof(ram_banks)); + + na = fdtdec_get_uint(nvtboot_blob, 0, "#address-cells", 2); + ns = fdtdec_get_uint(nvtboot_blob, 0, "#size-cells", 2); + + node = fdt_path_offset(nvtboot_blob, "/memory"); + if (node < 0) { + error("Can't find /memory node in nvtboot DTB"); + hang(); + } + prop = fdt_getprop(nvtboot_blob, node, "reg", &len); + if (!prop) { + error("Can't find /memory/reg property in nvtboot DTB"); + hang(); + } + + len /= (na + ns); + if (len > ARRAY_SIZE(ram_banks)) + len = ARRAY_SIZE(ram_banks); + + gd->ram_size = 0; + for (i = 0; i < len; i++) { + ram_banks[i].start = of_read_number(prop, na); + prop += na; + ram_banks[i].size = of_read_number(prop, ns); + prop += ns; + gd->ram_size += ram_banks[i].size; + } + + return 0; +} + +extern unsigned long nvtboot_boot_x0; + +void dram_init_banksize(void) +{ + int i; + + for (i = 0; i < 2; i++) { + gd->bd->bi_dram[i].start = ram_banks[i].start; + gd->bd->bi_dram[i].size = ram_banks[i].size; + } +} + +ulong board_get_usable_ram_top(ulong total_size) +{ + return ram_banks[0].start + ram_banks[0].size; +} diff --git a/arch/arm/mach-tegra/tegra20/Makefile b/arch/arm/mach-tegra/tegra20/Makefile index 17c19900e2..72d82a5218 100644 --- a/arch/arm/mach-tegra/tegra20/Makefile +++ b/arch/arm/mach-tegra/tegra20/Makefile @@ -10,7 +10,8 @@ endif # The AVP is ARMv4T architecture so we must use special compiler # flags for any startup files it might use. -CFLAGS_warmboot_avp.o += -march=armv4t +CFLAGS_warmboot_avp.o = -march=armv4t -U__LINUX_ARM_ARCH__ \ + -D__LINUX_ARM_ARCH__=4 obj-y += clock.o funcmux.o pinmux.o obj-$(CONFIG_TEGRA_LP0) += warmboot.o crypto.o warmboot_avp.o |