Date: Tue, 29 Apr 2014 17:52:21 -0600 From: Ian Lepore <ian@FreeBSD.org> To: Thomas Skibo <ThomasSkibo@sbcglobal.net> Cc: freebsd-arm <freebsd-arm@FreeBSD.org> Subject: Re: Microzed bug-fix, Message-ID: <1398815541.22079.46.camel@revolution.hippie.lan> In-Reply-To: <53601828.7030800@sbcglobal.net>
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[-- Attachment #1 --]
On Tue, 2014-04-29 at 14:22 -0700, Thomas Skibo wrote:
> Hi,
>
> Another bug-fix.
>
> Without this, Microzed or any other Zynq board with 1G of memory panics.
> It is because of a lack of contiguous virtual space. I moved the
> mappings of PSIO devices to increase vm_max_kernel_address.
>
> I wonder if we'll still have this problem running an ARM board with 2G
> memory.
There's a newer way to do this, but I didn't do the xilinx stuff when I
set this up last year because I had no way to test it. The new scheme
lets you declare the physaddr and size of any regions to be
device-mapped, and it dynamically allocates virtual address space for it
from the top down, so device mapping doesn't waste any space.
Please try the attached patch. The *_VBASE defines are deleted because
those things aren't at a fixed address anymore. If it's ever necessary
to get a virtual address outside of the bus_space system (like for a
debugging uart) you can call arm_devmap_ptov().
Oh -- I have 2G wandboards that have no trouble with memory.
-- Ian
[-- Attachment #2 --]
Index: sys/arm/xilinx/zy7_machdep.c
===================================================================
--- sys/arm/xilinx/zy7_machdep.c (revision 265110)
+++ sys/arm/xilinx/zy7_machdep.c (working copy)
@@ -60,7 +60,7 @@ vm_offset_t
initarm_lastaddr(void)
{
- return (ZYNQ7_PSIO_VBASE);
+ return (arm_devmap_lastaddr());
}
void
@@ -79,39 +79,18 @@ initarm_late_init(void)
{
}
-#define FDT_DEVMAP_SIZE 3
-static struct arm_devmap_entry fdt_devmap[FDT_DEVMAP_SIZE];
-
/*
- * Construct pmap_devmap[] with DT-derived config data.
+ * Set up static device mappings. Not strictly necessary -- simplebus will
+ * dynamically establish mappings as needed -- but doing it this way gets us
+ * nice efficient 1MB section mappings.
*/
int
initarm_devmap_init(void)
{
- int i = 0;
- fdt_devmap[i].pd_va = ZYNQ7_PSIO_VBASE;
- fdt_devmap[i].pd_pa = ZYNQ7_PSIO_HWBASE;
- fdt_devmap[i].pd_size = ZYNQ7_PSIO_SIZE;
- fdt_devmap[i].pd_prot = VM_PROT_READ | VM_PROT_WRITE;
- fdt_devmap[i].pd_cache = PTE_DEVICE;
- i++;
+ arm_devmap_add_entry(ZYNQ7_PSIO_HWBASE, ZYNQ7_PSIO_SIZE);
+ arm_devmap_add_entry(ZYNQ7_PSCTL_HWBASE, ZYNQ7_PSCTL_SIZE);
- fdt_devmap[i].pd_va = ZYNQ7_PSCTL_VBASE;
- fdt_devmap[i].pd_pa = ZYNQ7_PSCTL_HWBASE;
- fdt_devmap[i].pd_size = ZYNQ7_PSCTL_SIZE;
- fdt_devmap[i].pd_prot = VM_PROT_READ | VM_PROT_WRITE;
- fdt_devmap[i].pd_cache = PTE_DEVICE;
- i++;
-
- /* end of table */
- fdt_devmap[i].pd_va = 0;
- fdt_devmap[i].pd_pa = 0;
- fdt_devmap[i].pd_size = 0;
- fdt_devmap[i].pd_prot = 0;
- fdt_devmap[i].pd_cache = 0;
-
- arm_devmap_register_table(&fdt_devmap[0]);
return (0);
}
Index: sys/arm/xilinx/zy7_reg.h
===================================================================
--- sys/arm/xilinx/zy7_reg.h (revision 265110)
+++ sys/arm/xilinx/zy7_reg.h (working copy)
@@ -44,16 +44,13 @@
#define ZYNQ7_PLGP1_SIZE 0x40000000
/* I/O Peripheral registers. */
-#define ZYNQ7_PSIO_VBASE 0xE0000000
#define ZYNQ7_PSIO_HWBASE 0xE0000000
#define ZYNQ7_PSIO_SIZE 0x00300000
/* UART0 and UART1 */
-#define ZYNQ7_UART0_VBASE (ZYNQ7_PSIO_VBASE)
#define ZYNQ7_UART0_HWBASE (ZYNQ7_PSIO_HWBASE)
#define ZYNQ7_UART0_SIZE 0x1000
-#define ZYNQ7_UART1_VBASE (ZYNQ7_PSIO_VBASE+0x1000)
#define ZYNQ7_UART1_HWBASE (ZYNQ7_PSIO_HWBASE+0x1000)
#define ZYNQ7_UART1_SIZE 0x1000
@@ -63,15 +60,12 @@
#define ZYNQ7_SMC_SIZE 0x05000000
/* SLCR, PS system, and CPU private registers combined in this region. */
-#define ZYNQ7_PSCTL_VBASE 0xF8000000
#define ZYNQ7_PSCTL_HWBASE 0xF8000000
#define ZYNQ7_PSCTL_SIZE 0x01000000
-#define ZYNQ7_SLCR_VBASE (ZYNQ7_PSCTL_VBASE)
#define ZYNQ7_SLCR_HWBASE (ZYNQ7_PSCTL_HWBASE)
#define ZYNQ7_SLCR_SIZE 0x1000
-#define ZYNQ7_DEVCFG_VBASE (ZYNQ7_PSCTL_VBASE+0x7000)
#define ZYNQ7_DEVCFG_HWBASE (ZYNQ7_PSCTL_HWBASE+0x7000)
#define ZYNQ7_DEVCFG_SIZE 0x1000
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