From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 arch/mips/alchemy/common/setup.c | 107 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 arch/mips/alchemy/common/setup.c

(limited to 'arch/mips/alchemy/common/setup.c')

diff --git a/arch/mips/alchemy/common/setup.c b/arch/mips/alchemy/common/setup.c
new file mode 100644
index 000000000..2388d6878
--- /dev/null
+++ b/arch/mips/alchemy/common/setup.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2000, 2007-2008 MontaVista Software Inc.
+ * Author: MontaVista Software, Inc. <source@mvista.com
+ *
+ * Updates to 2.6, Pete Popov, Embedded Alley Solutions, Inc.
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/mm.h>
+#include <linux/dma-map-ops.h> /* for dma_default_coherent */
+
+#include <asm/mipsregs.h>
+
+#include <au1000.h>
+
+extern void __init board_setup(void);
+extern void __init alchemy_set_lpj(void);
+
+static bool alchemy_dma_coherent(void)
+{
+	switch (alchemy_get_cputype()) {
+	case ALCHEMY_CPU_AU1000:
+	case ALCHEMY_CPU_AU1500:
+	case ALCHEMY_CPU_AU1100:
+		return false;
+	case ALCHEMY_CPU_AU1200:
+		/* Au1200 AB USB does not support coherent memory */
+		if ((read_c0_prid() & PRID_REV_MASK) == 0)
+			return false;
+		return true;
+	default:
+		return true;
+	}
+}
+
+void __init plat_mem_setup(void)
+{
+	alchemy_set_lpj();
+
+	if (au1xxx_cpu_needs_config_od())
+		/* Various early Au1xx0 errata corrected by this */
+		set_c0_config(1 << 19); /* Set Config[OD] */
+	else
+		/* Clear to obtain best system bus performance */
+		clear_c0_config(1 << 19); /* Clear Config[OD] */
+
+	dma_default_coherent = alchemy_dma_coherent();
+
+	board_setup();	/* board specific setup */
+
+	/* IO/MEM resources. */
+	set_io_port_base(0);
+	ioport_resource.start = IOPORT_RESOURCE_START;
+	ioport_resource.end = IOPORT_RESOURCE_END;
+	iomem_resource.start = IOMEM_RESOURCE_START;
+	iomem_resource.end = IOMEM_RESOURCE_END;
+}
+
+#ifdef CONFIG_MIPS_FIXUP_BIGPHYS_ADDR
+/* This routine should be valid for all Au1x based boards */
+phys_addr_t fixup_bigphys_addr(phys_addr_t phys_addr, phys_addr_t size)
+{
+	unsigned long start = ALCHEMY_PCI_MEMWIN_START;
+	unsigned long end = ALCHEMY_PCI_MEMWIN_END;
+
+	/* Don't fixup 36-bit addresses */
+	if ((phys_addr >> 32) != 0)
+		return phys_addr;
+
+	/* Check for PCI memory window */
+	if (phys_addr >= start && (phys_addr + size - 1) <= end)
+		return (phys_addr_t)(AU1500_PCI_MEM_PHYS_ADDR + phys_addr);
+
+	/* default nop */
+	return phys_addr;
+}
+
+int io_remap_pfn_range(struct vm_area_struct *vma, unsigned long vaddr,
+		unsigned long pfn, unsigned long size, pgprot_t prot)
+{
+	phys_addr_t phys_addr = fixup_bigphys_addr(pfn << PAGE_SHIFT, size);
+
+	return remap_pfn_range(vma, vaddr, phys_addr >> PAGE_SHIFT, size, prot);
+}
+EXPORT_SYMBOL(io_remap_pfn_range);
+#endif /* CONFIG_MIPS_FIXUP_BIGPHYS_ADDR */
-- 
cgit v1.2.3