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powerpc: Initialize btext subsystem later, after prom_init

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We were initializing the btext stuff from prom_init(), thus breaking
the rule that all communication between prom_init() and the rest of
the kernel has to be via the flattened device tree.  This removes
the btext initialization calls from prom_init() and initializes it
instead after the device tree is unflattened.  It would be nice to
do it earlier, but that needs some more infrastructure to find the
properties we need in the flattened device tree.

Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Paul Mackerras 2005-10-17 19:20:46 +10:00
parent 7dffb72028
commit 30cd4a4e9c
4 changed files with 4 additions and 106 deletions
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28
arch/powerpc/kernel/head_32.S
View File

@ -153,9 +153,6 @@ __after_mmu_off:
bl flush_tlbs
bl initial_bats
#if !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT)
bl setup_disp_bat
#endif
/*
* Call setup_cpu for CPU 0 and initialize 6xx Idle
@ -1297,31 +1294,6 @@ initial_bats:
isync
blr
#if !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT)
setup_disp_bat:
/*
* setup the display bat prepared for us in prom.c
*/
mflr r8
bl reloc_offset
mtlr r8
addis r8,r3,disp_BAT@ha
addi r8,r8,disp_BAT@l
lwz r11,0(r8)
lwz r8,4(r8)
mfspr r9,SPRN_PVR
rlwinm r9,r9,16,16,31 /* r9 = 1 for 601, 4 for 604 */
cmpwi 0,r9,1
beq 1f
mtspr SPRN_DBAT3L,r8
mtspr SPRN_DBAT3U,r11
blr
1: mtspr SPRN_IBAT3L,r8
mtspr SPRN_IBAT3U,r11
blr
#endif /* !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT) */
#ifdef CONFIG_8260
/* Jump into the system reset for the rom.

59
arch/powerpc/kernel/prom_init.c
View File

@ -1404,62 +1404,6 @@ static int __init prom_find_machine_type(void)
#endif
}
static int __init setup_disp(phandle dp)
{
#if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
int width = 640, height = 480, depth = 8, pitch;
unsigned address;
u32 addrs[8][5];
int i, naddrs;
char name[32];
char *getprop = "getprop";
prom_printf("Initializing screen: ");
memset(name, 0, sizeof(name));
call_prom(getprop, 4, 1, dp, "name", name, sizeof(name));
name[sizeof(name)-1] = 0;
prom_print(name);
prom_print("\n");
call_prom(getprop, 4, 1, dp, "width", &width, sizeof(width));
call_prom(getprop, 4, 1, dp, "height", &height, sizeof(height));
call_prom(getprop, 4, 1, dp, "depth", &depth, sizeof(depth));
pitch = width * ((depth + 7) / 8);
call_prom(getprop, 4, 1, dp, "linebytes",
&pitch, sizeof(pitch));
if (pitch == 1)
pitch = 0x1000; /* for strange IBM display */
address = 0;
call_prom(getprop, 4, 1, dp, "address", &address, sizeof(address));
if (address == 0) {
/* look for an assigned address with a size of >= 1MB */
naddrs = call_prom(getprop, 4, 1, dp, "assigned-addresses",
addrs, sizeof(addrs));
naddrs /= 20;
for (i = 0; i < naddrs; ++i) {
if (addrs[i][4] >= (1 << 20)) {
address = addrs[i][2];
/* use the BE aperture if possible */
if (addrs[i][4] >= (16 << 20))
address += (8 << 20);
break;
}
}
if (address == 0) {
prom_print("Failed to get address\n");
return 0;
}
}
/* kludge for valkyrie */
if (strcmp(name, "valkyrie") == 0)
address += 0x1000;
prom_printf("\n\n\n\naddress = %x\n", address);
btext_setup_display(width, height, depth, pitch, address);
#endif /* CONFIG_BOOTX_TEXT && CONFIG_PPC32 */
return 1;
}
static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
{
return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
@ -1479,7 +1423,6 @@ static void __init prom_check_displays(void)
phandle node;
ihandle ih;
int i;
int got_display = 0;
static unsigned char default_colors[] = {
0x00, 0x00, 0x00,
@ -1546,8 +1489,6 @@ static void __init prom_check_displays(void)
clut[2]) != 0)
break;
#endif /* CONFIG_LOGO_LINUX_CLUT224 */
if (!got_display)
got_display = setup_disp(node);
}
}

16
arch/powerpc/kernel/setup_32.c
View File

@ -294,8 +294,6 @@ unsigned long __init early_init(unsigned long dt_ptr)
{
unsigned long offset = reloc_offset();
reloc_got2(offset);
/*
* Identify the CPU type and fix up code sections
* that depend on which cpu we have.
@ -303,12 +301,6 @@ unsigned long __init early_init(unsigned long dt_ptr)
identify_cpu(offset, 0);
do_cpu_ftr_fixups(offset);
#ifdef CONFIG_BOOTX_TEXT
btext_prepare_BAT();
#endif
reloc_got2(-offset);
return KERNELBASE + offset;
}
@ -578,13 +570,13 @@ void __init setup_arch(char **cmdline_p)
/* so udelay does something sensible, assume <= 1000 bogomips */
loops_per_jiffy = 500000000 / HZ;
#ifdef CONFIG_BOOTX_TEXT
map_boot_text();
#endif
unflatten_device_tree();
finish_device_tree();
#ifdef CONFIG_BOOTX_TEXT
init_boot_display();
#endif
#ifdef CONFIG_PPC_MULTIPLATFORM
/* This could be called "early setup arch", it must be done
* now because xmon need it

7
arch/powerpc/mm/init_32.c
View File

@ -188,13 +188,6 @@ void __init MMU_init(void)
if (ppc_md.progress)
ppc_md.progress("MMU:exit", 0x211);
#ifdef CONFIG_BOOTX_TEXT
/* By default, we are no longer mapped */
boot_text_mapped = 0;
/* Must be done last, or ppc_md.progress will die. */
map_boot_text();
#endif
}
/* This is only called until mem_init is done. */