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ARM: tegra: don't include iomap.h from debug-macro.S

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In order to move Tegra's debug-macro.S to a common location for single
zImage, it must not rely on any machine-specific header files such as
<mach/iomap.h>. Duplicate the few physical address definitions that
debug-macro.S relies upon directly into the file.

To avoid tegra_io_desc[] requiring shared knowledge of the UART
mapping's virtual address, use a virtual address outside the ranges
in tegra_io_desc[]. Call debug_ll_io_init() to propagate the mapping
beyond the early pages tables.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Stephen Warren 2012-10-19 12:27:58 -06:00
parent 1a6d3da8bc
commit 7a28106509
2 changed files with 20 additions and 5 deletions
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24
arch/arm/mach-tegra/include/mach/debug-macro.S
View File

@ -26,10 +26,18 @@
#include <linux/serial_reg.h>
#include "../../iomap.h"
#define UART_SHIFT 2
/* Physical addresses */
#define TEGRA_CLK_RESET_BASE 0x60006000
#define TEGRA_APB_MISC_BASE 0x70000000
#define TEGRA_UARTA_BASE 0x70006000
#define TEGRA_UARTB_BASE 0x70006040
#define TEGRA_UARTC_BASE 0x70006200
#define TEGRA_UARTD_BASE 0x70006300
#define TEGRA_UARTE_BASE 0x70006400
#define TEGRA_PMC_BASE 0x7000e400
#define TEGRA_CLK_RST_DEVICES_L (TEGRA_CLK_RESET_BASE + 0x04)
#define TEGRA_CLK_RST_DEVICES_H (TEGRA_CLK_RESET_BASE + 0x08)
#define TEGRA_CLK_RST_DEVICES_U (TEGRA_CLK_RESET_BASE + 0x0c)
@ -39,6 +47,12 @@
#define TEGRA_PMC_SCRATCH20 (TEGRA_PMC_BASE + 0xa0)
#define TEGRA_APB_MISC_GP_HIDREV (TEGRA_APB_MISC_BASE + 0x804)
/*
* Must be 1MB-aligned since a 1MB mapping is used early on.
* Must not overlap with regions in mach-tegra/io.c:tegra_io_desc[].
*/
#define UART_VIRTUAL_BASE 0xfe100000
#define checkuart(rp, rv, lhu, bit, uart) \
/* Load address of CLK_RST register */ \
movw rp, #TEGRA_CLK_RST_DEVICES_##lhu & 0xffff ; \
@ -139,10 +153,10 @@
91: str \rp, [\tmp, #4] @ Store in tegra_uart_phys
cmp \rp, #0 @ Valid UART address?
bne 92f @ Yes, go process it
str \rp, [\tmp, #8] @ Store 0 in tegra_uart_phys
str \rp, [\tmp, #8] @ Store 0 in tegra_uart_virt
b 100f @ Done
92: sub \rv, \rp, #IO_APB_PHYS @ Calculate virt address
add \rv, \rv, #IO_APB_VIRT
92: and \rv, \rp, #0xffffff @ offset within 1MB section
add \rv, \rv, #UART_VIRTUAL_BASE
str \rv, [\tmp, #8] @ Store in tegra_uart_virt
movw \rv, #TEGRA_APB_MISC_GP_HIDREV & 0xffff
movt \rv, #TEGRA_APB_MISC_GP_HIDREV >> 16

1
arch/arm/mach-tegra/io.c
View File

@ -59,5 +59,6 @@ static struct map_desc tegra_io_desc[] __initdata = {
void __init tegra_map_common_io(void)
{
debug_ll_io_init();
iotable_init(tegra_io_desc, ARRAY_SIZE(tegra_io_desc));
}