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Rev 1831 Rev 1832
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#include <arch/drivers/xconsole.h>
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#include <arch/drivers/xconsole.h>
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#include <putchar.h>
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#include <putchar.h>
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#include <console/chardev.h>
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#include <console/chardev.h>
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#include <console/console.h>
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#include <console/console.h>
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#include <arch/hypercall.h>
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#include <arch/hypercall.h>
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#include <mm/frame.h>
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#define MASK_INDEX(index, ring) ((index) & (sizeof(ring) - 1))
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#define MASK_INDEX(index, ring) ((index) & (sizeof(ring) - 1))
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typedef struct {
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    char in[1024];
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    char out[2048];
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    uint32_t in_cons;
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    uint32_t in_prod;
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    uint32_t out_cons;
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    uint32_t out_prod;
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} xencons_t;
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static bool asynchronous = false;
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static bool asynchronous = false;
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static void xen_putchar(chardev_t *d, const char ch);
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static void xen_putchar(chardev_t *d, const char ch);
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chardev_t xen_console;
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chardev_t xen_console;
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static chardev_operations_t xen_ops = {
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static chardev_operations_t xen_ops = {
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}
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}
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void xen_putchar(chardev_t *d, const char ch)
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void xen_putchar(chardev_t *d, const char ch)
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{
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{
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    if (asynchronous) {
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    if (asynchronous) {
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        xencons_t *console = (xencons_t *) PA2KA(MA2PA(PFN2ADDR(start_info.console_mfn)));
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        uint32_t cons = console->out_cons;
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        uint32_t cons = console_page.out_cons;
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        uint32_t prod = console->out_prod;
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        uint32_t prod = console_page.out_prod;
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        memory_barrier();
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        memory_barrier();
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        if ((prod - cons) > sizeof(console->out))
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        if ((prod - cons) > sizeof(console_page.out))
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            return;
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            return;
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        if (ch == '\n')
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        if (ch == '\n')
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            console->out[MASK_INDEX(prod++, console->out)] = '\r';
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            console_page.out[MASK_INDEX(prod++, console_page.out)] = '\r';
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        console->out[MASK_INDEX(prod++, console->out)] = ch;
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        console_page.out[MASK_INDEX(prod++, console_page.out)] = ch;
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        write_barrier();
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        write_barrier();
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        console->out_prod = prod;
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        console_page.out_prod = prod;
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        xen_notify_remote(start_info.console_evtchn);
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        xen_notify_remote(start_info.console_evtchn);
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    } else
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    } else
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        xen_console_io(CONSOLE_IO_WRITE, 1, &ch);
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        xen_console_io(CONSOLE_IO_WRITE, 1, &ch);
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}
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}