Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 179 insertions, 0 deletions

diff --git a/arch/alpha/kernel/sys_sx164.c b/arch/alpha/kernel/sys_sx164.c
new file mode 100644
index 0000000000..dd9de84b63
--- /dev/null
+++ b/arch/alpha/kernel/sys_sx164.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *	linux/arch/alpha/kernel/sys_sx164.c
+ *
+ *	Copyright (C) 1995 David A Rusling
+ *	Copyright (C) 1996 Jay A Estabrook
+ *	Copyright (C) 1998, 1999, 2000 Richard Henderson
+ *
+ * Code supporting the SX164 (PCA56+PYXIS).
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/bitops.h>
+
+#include <asm/ptrace.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include <asm/mmu_context.h>
+#include <asm/io.h>
+#include <asm/core_cia.h>
+#include <asm/hwrpb.h>
+#include <asm/tlbflush.h>
+#include <asm/special_insns.h>
+
+#include "proto.h"
+#include "irq_impl.h"
+#include "pci_impl.h"
+#include "machvec_impl.h"
+
+
+static void __init
+sx164_init_irq(void)
+{
+	outb(0, DMA1_RESET_REG);
+	outb(0, DMA2_RESET_REG);
+	outb(DMA_MODE_CASCADE, DMA2_MODE_REG);
+	outb(0, DMA2_MASK_REG);
+
+	if (alpha_using_srm)
+		alpha_mv.device_interrupt = srm_device_interrupt;
+
+	init_i8259a_irqs();
+
+	/* Not interested in the bogus interrupts (0,3,4,5,40-47),
+	   NMI (1), or HALT (2).  */
+	if (alpha_using_srm)
+		init_srm_irqs(40, 0x3f0000);
+	else
+		init_pyxis_irqs(0xff00003f0000UL);
+
+	if (request_irq(16 + 6, no_action, 0, "timer-cascade", NULL))
+		pr_err("Failed to register timer-cascade interrupt\n");
+}
+
+/*
+ * PCI Fixup configuration.
+ *
+ * Summary @ PYXIS_INT_REQ:
+ * Bit      Meaning
+ * 0        RSVD
+ * 1        NMI
+ * 2        Halt/Reset switch
+ * 3        MBZ
+ * 4        RAZ
+ * 5        RAZ
+ * 6        Interval timer (RTC)
+ * 7        PCI-ISA Bridge
+ * 8        Interrupt Line A from slot 3
+ * 9        Interrupt Line A from slot 2
+ *10        Interrupt Line A from slot 1
+ *11        Interrupt Line A from slot 0
+ *12        Interrupt Line B from slot 3
+ *13        Interrupt Line B from slot 2
+ *14        Interrupt Line B from slot 1
+ *15        Interrupt line B from slot 0
+ *16        Interrupt Line C from slot 3
+ *17        Interrupt Line C from slot 2
+ *18        Interrupt Line C from slot 1
+ *19        Interrupt Line C from slot 0
+ *20        Interrupt Line D from slot 3
+ *21        Interrupt Line D from slot 2
+ *22        Interrupt Line D from slot 1
+ *23        Interrupt Line D from slot 0
+ *
+ * IdSel       
+ *   5  32 bit PCI option slot 2
+ *   6  64 bit PCI option slot 0
+ *   7  64 bit PCI option slot 1
+ *   8  Cypress I/O
+ *   9  32 bit PCI option slot 3
+ */
+
+static int
+sx164_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
+{
+	static char irq_tab[5][5] = {
+		/*INT    INTA   INTB   INTC   INTD */
+		{ 16+ 9, 16+ 9, 16+13, 16+17, 16+21}, /* IdSel 5 slot 2 J17 */
+		{ 16+11, 16+11, 16+15, 16+19, 16+23}, /* IdSel 6 slot 0 J19 */
+		{ 16+10, 16+10, 16+14, 16+18, 16+22}, /* IdSel 7 slot 1 J18 */
+		{    -1,    -1,    -1,	  -1,    -1}, /* IdSel 8 SIO        */
+		{ 16+ 8, 16+ 8, 16+12, 16+16, 16+20}  /* IdSel 9 slot 3 J15 */
+	};
+	const long min_idsel = 5, max_idsel = 9, irqs_per_slot = 5;
+	return COMMON_TABLE_LOOKUP;
+}
+
+static void __init
+sx164_init_pci(void)
+{
+	cia_init_pci();
+	SMC669_Init(0);
+}
+
+static void __init
+sx164_init_arch(void)
+{
+	/*
+	 * OSF palcode v1.23 forgets to enable PCA56 Motion Video
+	 * Instructions. Let's enable it.
+	 * We have to check palcode revision because CSERVE interface
+	 * is subject to change without notice. For example, it
+	 * has been changed completely since v1.16 (found in MILO
+	 * distribution). -ink
+	 */
+	struct percpu_struct *cpu = (struct percpu_struct*)
+		((char*)hwrpb + hwrpb->processor_offset);
+
+	if (amask(AMASK_MAX) != 0
+	    && alpha_using_srm
+	    && (cpu->pal_revision & 0xffff) <= 0x117) {
+		__asm__ __volatile__(
+		"lda	$16,8($31)\n"
+		"call_pal 9\n"		/* Allow PALRES insns in kernel mode */
+		".long  0x64000118\n\n"	/* hw_mfpr $0,icsr */
+		"ldah	$16,(1<<(19-16))($31)\n"
+		"or	$0,$16,$0\n"	/* set MVE bit */
+		".long  0x74000118\n"	/* hw_mtpr $0,icsr */
+		"lda	$16,9($31)\n"
+		"call_pal 9"		/* Disable PALRES insns */
+		: : : "$0", "$16");
+		printk("PCA56 MVI set enabled\n");
+	}
+
+	pyxis_init_arch();
+}
+
+/*
+ * The System Vector
+ */
+
+struct alpha_machine_vector sx164_mv __initmv = {
+	.vector_name		= "SX164",
+	DO_EV5_MMU,
+	DO_DEFAULT_RTC,
+	DO_PYXIS_IO,
+	.machine_check		= cia_machine_check,
+	.max_isa_dma_address	= ALPHA_MAX_ISA_DMA_ADDRESS,
+	.min_io_address		= DEFAULT_IO_BASE,
+	.min_mem_address	= DEFAULT_MEM_BASE,
+	.pci_dac_offset		= PYXIS_DAC_OFFSET,
+
+	.nr_irqs		= 48,
+	.device_interrupt	= pyxis_device_interrupt,
+
+	.init_arch		= sx164_init_arch,
+	.init_irq		= sx164_init_irq,
+	.init_rtc		= common_init_rtc,
+	.init_pci		= sx164_init_pci,
+	.kill_arch		= cia_kill_arch,
+	.pci_map_irq		= sx164_map_irq,
+	.pci_swizzle		= common_swizzle,
+};
+ALIAS_MV(sx164)