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HV: add API to change vuart base & irq config

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1. add an API to support vuart COM base and irq configured;
2. add the HV cmd to be parsed for vuart COM base & irq.

Tracked-On: #2170
Signed-off-by: Minggui Cao <minggui.cao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Minggui Cao
2018-12-25 10:06:37 +08:00
committed by wenlingz
parent f4beaf501c
commit a5ca305cf6
4 changed files with 28 additions and 0 deletions
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9
hypervisor/bsp/uefi/cmdline.c
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@@ -18,12 +18,19 @@ static const char * const cmd_list[] = {
"uart=disabled", /* to disable uart */
"uart=port@", /* like uart=port@0x3F8 */
"uart=bdf@", /*like: uart=bdf@0:18.2, it is for ttyS2 */
/* format: vuart=ttySx@irqN, like vuart=ttyS1@irq6; better to unify
* uart & vuart & SOS console the same one, and irq same with the native.
* ttySx range (0-3), irqN (0-255)
*/
"vuart=ttyS",
};
enum IDX_CMD {
IDX_DISABLE_UART,
IDX_PORT_UART,
IDX_PCI_UART,
IDX_SET_VUART,
IDX_MAX_CMD,
};
@@ -55,6 +62,8 @@ static void handle_cmd(const char *cmd, int32_t len)
} else if (i == IDX_PCI_UART) {
uart16550_set_property(true, false, (uint64_t)(cmd+tmp));
} else if (i == IDX_SET_VUART) {
vuart_set_property(cmd+tmp);
}
}
}

16
hypervisor/debug/vuart.c
View File

@@ -411,3 +411,19 @@ bool hv_used_dbg_intx(uint8_t intx_pin)
{
return is_dbg_uart_enabled() && (intx_pin == vuart_com_irq);
}
/* vuart=ttySx@irqN, like vuart=ttyS1@irq6 head "vuart=ttyS" is parsed */
void vuart_set_property(const char *vuart_info)
{
const uint16_t com_map[4] = {0x3f8, 0x2F8, 0x3E8, 0x2E8}; /* map to ttyS0-ttyS3 */
uint8_t com_idx;
com_idx = (uint8_t)(vuart_info[0] - '0');
if (com_idx < 4) {
vuart_com_base = com_map[com_idx];
}
if (strncmp(vuart_info + 1, "@irq", 4) == 0) {
vuart_com_irq = (uint8_t)strtol_deci(vuart_info + 5);
}
}

1
hypervisor/include/debug/vuart.h
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@@ -76,4 +76,5 @@ void vuart_console_tx_chars(struct acrn_vuart *vu);
void vuart_console_rx_chars(struct acrn_vuart *vu);
bool hv_used_dbg_intx(uint8_t intx_pin);
void vuart_set_property(const char *vuart_info);
#endif /* VUART_H */

2
hypervisor/release/vuart.c
View File

@@ -20,3 +20,5 @@ bool hv_used_dbg_intx(__unused uint8_t intx_pin)
{
return false;
}
void vuart_set_property(__unused const char *vuart_info) {}