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https://github.com/projectacrn/acrn-hypervisor.git
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c623e11125
The break key (key value 0x0) was used as switch key from guest serial to hv console and guest serial could not receive break key. This blocked some guest debugging features like KGDB/KDB, sysrq, etc. This patch leverages escape sequence "<escape> + <break>" to send break to guest and "<escape> + e" to switch from guest serial to hv console. Tracked-On: #8583 Signed-off-by: Qiang Zhang <qiang4.zhang@intel.com> Reviewed-by: Junjie Mao <junjie.mao@intel.com>
99 lines
3.5 KiB
C
99 lines
3.5 KiB
C
/*-
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* Copyright (c) 2013 Neel Natu <neel@freebsd.org>
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* Copyright (c) 2018-2022 Intel Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef VUART_H
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#define VUART_H
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#include <types.h>
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#include <asm/lib/spinlock.h>
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#include <asm/vm_config.h>
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#define RX_BUF_SIZE 256U
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#define TX_BUF_SIZE 8192U
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#define INVAILD_VUART_IDX 0xFFU
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#define COM1_BASE 0x3F8U
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#define COM2_BASE 0x2F8U
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#define COM3_BASE 0x3E8U
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#define COM4_BASE 0x2E8U
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#define INVALID_COM_BASE 0U
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#define COM1_IRQ 4U
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#define COM2_IRQ 3U
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#define COM3_IRQ 6U
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#define COM4_IRQ 7U
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struct vuart_fifo {
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char *buf;
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uint32_t rindex; /* index to read from */
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uint32_t windex; /* index to write to */
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uint32_t num; /* number of characters in the fifo */
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uint32_t size; /* size of the fifo */
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};
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struct acrn_vuart {
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uint8_t data; /* Data register (R/W) */
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uint8_t ier; /* Interrupt enable register (R/W) */
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uint8_t lcr; /* Line control register (R/W) */
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uint8_t mcr; /* Modem control register (R/W) */
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uint8_t lsr; /* Line status register (R/W) */
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uint8_t msr; /* Modem status register (R/W) */
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uint8_t fcr; /* FIFO control register (W) */
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uint8_t scr; /* Scratch register (R/W) */
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uint8_t dll; /* Baudrate divisor latch LSB */
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uint8_t dlh; /* Baudrate divisor latch MSB */
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struct vuart_fifo rxfifo;
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struct vuart_fifo txfifo;
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uint16_t port_base;
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uint32_t irq;
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char vuart_rx_buf[RX_BUF_SIZE];
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char vuart_tx_buf[TX_BUF_SIZE];
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bool thre_int_pending; /* THRE interrupt pending */
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bool active;
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bool escaping; /* in escaping sequence, for console vuarts */
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struct acrn_vuart *target_vu; /* Pointer to target vuart */
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struct acrn_vm *vm;
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struct pci_vdev *vdev; /* pci vuart */
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spinlock_t lock; /* protects all softc elements */
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};
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void init_legacy_vuarts(struct acrn_vm *vm, const struct vuart_config *vu_config);
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void deinit_legacy_vuarts(struct acrn_vm *vm);
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void init_pci_vuart(struct pci_vdev *vdev);
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void deinit_pci_vuart(struct pci_vdev *vdev);
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void vuart_putchar(struct acrn_vuart *vu, char ch);
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char vuart_getchar(struct acrn_vuart *vu);
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void vuart_toggle_intr(const struct acrn_vuart *vu);
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bool is_vuart_intx(const struct acrn_vm *vm, uint32_t intx_gsi);
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uint8_t vuart_read_reg(struct acrn_vuart *vu, uint16_t offset);
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void vuart_write_reg(struct acrn_vuart *vu, uint16_t offset, uint8_t value);
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#endif /* VUART_H */
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