Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / arch / i386 / drivers / net / undiisr.S

diff --git a/qemu/roms/ipxe/src/arch/i386/drivers/net/undiisr.S b/qemu/roms/ipxe/src/arch/i386/drivers/net/undiisr.S
new file mode 100644 (file)
index 0000000..b27effe
--- /dev/null
+++ b/qemu/roms/ipxe/src/arch/i386/drivers/net/undiisr.S
@@ -0,0 +1,87 @@
+FILE_LICENCE ( GPL2_OR_LATER )
+
+#define PXENV_UNDI_ISR 0x0014
+#define PXENV_UNDI_ISR_IN_START 1
+#define PXENV_UNDI_ISR_OUT_OURS 0
+#define PXENV_UNDI_ISR_OUT_NOT_OURS 1
+
+#define IRQ_PIC_CUTOFF 8
+#define ICR_EOI_NON_SPECIFIC 0x20
+#define PIC1_ICR 0x20
+#define PIC2_ICR 0xa0
+       
+       .text
+       .arch i386
+       .code16
+
+       .section ".text16", "ax", @progbits
+       .globl undiisr
+undiisr:
+       
+       /* Preserve registers */
+       pushw   %ds
+       pushw   %es
+       pushw   %fs
+       pushw   %gs
+       pushfl
+       pushal
+
+       /* Set up our segment registers */
+       movw    %cs:rm_ds, %ax
+       movw    %ax, %ds
+
+       /* Check that we have an UNDI entry point */
+       cmpw    $0, pxeparent_entry_point
+       je      chain
+       
+       /* Issue UNDI API call */
+       movw    %ax, %es
+       movw    $undinet_params, %di
+       movw    $PXENV_UNDI_ISR, %bx
+       movw    $PXENV_UNDI_ISR_IN_START, funcflag
+       pushw   %es
+       pushw   %di
+       pushw   %bx
+       lcall   *pxeparent_entry_point
+       cli     /* Just in case */
+       addw    $6, %sp
+       cmpw    $PXENV_UNDI_ISR_OUT_OURS, funcflag
+       jne     eoi
+       
+trig:  /* Record interrupt occurence */
+       incb    undiisr_trigger_count
+
+eoi:   /* Send EOI */
+       movb    $ICR_EOI_NON_SPECIFIC, %al
+       cmpb    $IRQ_PIC_CUTOFF, undiisr_irq
+       jb      1f
+       outb    %al, $PIC2_ICR
+1:     outb    %al, $PIC1_ICR
+       jmp     exit
+       
+chain: /* Chain to next handler */
+       pushfw
+       lcall   *undiisr_next_handler
+       
+exit:  /* Restore registers and return */
+       cli
+       popal
+       movzwl  %sp, %esp
+       addr32  movl -20(%esp), %esp    /* %esp isn't restored by popal */
+       popfl
+       popw    %gs
+       popw    %fs
+       popw    %es
+       popw    %ds
+       iret
+
+       .section ".data16", "aw", @progbits
+undinet_params:
+status:                        .word   0
+funcflag:              .word   0
+bufferlength:          .word   0
+framelength:           .word   0
+frameheaderlength:     .word   0
+frame:                 .word   0, 0
+prottype:              .byte   0
+pkttype:               .byte   0