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authorAlan Hourihane <alanh@fairlite.demon.co.uk>2007-09-02 19:59:34 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-10-12 23:43:11 +0100
commite16edefe6532c032d86ee802b63972e3a1e953a9 (patch)
tree6c9c7aa8973719ff58013c7b5c7c1c87b1d5f3c3
parentbf62e8626963d0002315facb786a8833d404e21e (diff)
downloadop-kernel-dev-e16edefe6532c032d86ee802b63972e3a1e953a9.zip
op-kernel-dev-e16edefe6532c032d86ee802b63972e3a1e953a9.tar.gz
[ARM] 4564/1: Add tagged list support for Acorn RiscPC's uncompress code
arch_decomp_setup() does not understand the new tagged lists for parameter setup. It's fixed in using the older param struct. This patch adds support for tagged lists and allows the older param struct too. Signed-off-by: Alan Hourihane <alanh@fairlite.demon.co.uk> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--include/asm-arm/arch-rpc/uncompress.h72
1 files changed, 57 insertions, 15 deletions
diff --git a/include/asm-arm/arch-rpc/uncompress.h b/include/asm-arm/arch-rpc/uncompress.h
index 06231ed..b8e29ef 100644
--- a/include/asm-arm/arch-rpc/uncompress.h
+++ b/include/asm-arm/arch-rpc/uncompress.h
@@ -11,9 +11,11 @@
#include <asm/hardware.h>
#include <asm/io.h>
+#include <asm/setup.h>
+#include <asm/page.h>
-int video_num_columns, video_num_lines, video_size_row;
-int white, bytes_per_char_h;
+int video_size_row;
+unsigned char bytes_per_char_h;
extern unsigned long con_charconvtable[256];
struct param_struct {
@@ -64,6 +66,13 @@ extern __attribute__((pure)) struct param_struct *params(void);
#define params (params())
#ifndef STANDALONE_DEBUG
+static unsigned long video_num_cols;
+static unsigned long video_num_rows;
+static unsigned long video_x;
+static unsigned long video_y;
+static unsigned char bytes_per_char_v;
+static int white;
+
/*
* This does not append a newline
*/
@@ -73,27 +82,27 @@ static void putc(int c)
int x,y;
char *ptr;
- x = params->video_x;
- y = params->video_y;
+ x = video_x;
+ y = video_y;
if (c == '\n') {
- if (++y >= video_num_lines)
+ if (++y >= video_num_rows)
y--;
} else if (c == '\r') {
x = 0;
} else {
- ptr = VIDMEM + ((y*video_num_columns*params->bytes_per_char_v+x)*bytes_per_char_h);
+ ptr = VIDMEM + ((y*video_num_cols*bytes_per_char_v+x)*bytes_per_char_h);
ll_write_char(ptr, c, white);
- if (++x >= video_num_columns) {
+ if (++x >= video_num_cols) {
x = 0;
- if ( ++y >= video_num_lines ) {
+ if ( ++y >= video_num_rows ) {
y--;
}
}
}
- params->video_x = x;
- params->video_y = y;
+ video_x = x;
+ video_y = y;
}
static inline void flush(void)
@@ -108,11 +117,44 @@ static void error(char *x);
static void arch_decomp_setup(void)
{
int i;
+ struct tag *t = (struct tag *)params;
+ unsigned int nr_pages = 0, page_size = PAGE_SIZE;
+
+ if (t->hdr.tag == ATAG_CORE)
+ {
+ for (; t->hdr.size; t = tag_next(t))
+ {
+ if (t->hdr.tag == ATAG_VIDEOTEXT)
+ {
+ video_num_rows = t->u.videotext.video_lines;
+ video_num_cols = t->u.videotext.video_cols;
+ bytes_per_char_h = t->u.videotext.video_points;
+ bytes_per_char_v = t->u.videotext.video_points;
+ video_x = t->u.videotext.x;
+ video_y = t->u.videotext.y;
+ }
+
+ if (t->hdr.tag == ATAG_MEM)
+ {
+ page_size = PAGE_SIZE;
+ nr_pages += (t->u.mem.size / PAGE_SIZE);
+ }
+ }
+ }
+ else
+ {
+ nr_pages = params->nr_pages;
+ page_size = params->page_size;
+ video_num_rows = params->video_num_rows;
+ video_num_cols = params->video_num_cols;
+ video_x = params->video_x;
+ video_y = params->video_y;
+ bytes_per_char_h = params->bytes_per_char_h;
+ bytes_per_char_v = params->bytes_per_char_v;
+ }
+
+ video_size_row = video_num_cols * bytes_per_char_h;
- video_num_lines = params->video_num_rows;
- video_num_columns = params->video_num_cols;
- bytes_per_char_h = params->bytes_per_char_h;
- video_size_row = video_num_columns * bytes_per_char_h;
if (bytes_per_char_h == 4)
for (i = 0; i < 256; i++)
con_charconvtable[i] =
@@ -146,7 +188,7 @@ static void arch_decomp_setup(void)
white = 7;
}
- if (params->nr_pages * params->page_size < 4096*1024) error("<4M of mem\n");
+ if (nr_pages * page_size < 4096*1024) error("<4M of mem\n");
}
#endif
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