mirror of https://gitee.com/openkylin/linux.git
powerpc: Initialize btext subsystem later, after prom_init
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
parent
7dffb72028
commit
30cd4a4e9c
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@ -153,9 +153,6 @@ __after_mmu_off:
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bl flush_tlbs
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bl initial_bats
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#if !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT)
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bl setup_disp_bat
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#endif
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/*
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* Call setup_cpu for CPU 0 and initialize 6xx Idle
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@ -1297,31 +1294,6 @@ initial_bats:
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isync
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blr
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#if !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT)
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setup_disp_bat:
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/*
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* setup the display bat prepared for us in prom.c
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*/
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mflr r8
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bl reloc_offset
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mtlr r8
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addis r8,r3,disp_BAT@ha
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addi r8,r8,disp_BAT@l
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lwz r11,0(r8)
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lwz r8,4(r8)
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mfspr r9,SPRN_PVR
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rlwinm r9,r9,16,16,31 /* r9 = 1 for 601, 4 for 604 */
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cmpwi 0,r9,1
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beq 1f
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mtspr SPRN_DBAT3L,r8
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mtspr SPRN_DBAT3U,r11
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blr
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1: mtspr SPRN_IBAT3L,r8
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mtspr SPRN_IBAT3U,r11
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blr
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#endif /* !defined(CONFIG_APUS) && defined(CONFIG_BOOTX_TEXT) */
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#ifdef CONFIG_8260
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/* Jump into the system reset for the rom.
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@ -1404,62 +1404,6 @@ static int __init prom_find_machine_type(void)
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#endif
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}
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static int __init setup_disp(phandle dp)
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{
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#if defined(CONFIG_BOOTX_TEXT) && defined(CONFIG_PPC32)
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int width = 640, height = 480, depth = 8, pitch;
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unsigned address;
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u32 addrs[8][5];
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int i, naddrs;
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char name[32];
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char *getprop = "getprop";
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prom_printf("Initializing screen: ");
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memset(name, 0, sizeof(name));
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call_prom(getprop, 4, 1, dp, "name", name, sizeof(name));
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name[sizeof(name)-1] = 0;
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prom_print(name);
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prom_print("\n");
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call_prom(getprop, 4, 1, dp, "width", &width, sizeof(width));
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call_prom(getprop, 4, 1, dp, "height", &height, sizeof(height));
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call_prom(getprop, 4, 1, dp, "depth", &depth, sizeof(depth));
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pitch = width * ((depth + 7) / 8);
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call_prom(getprop, 4, 1, dp, "linebytes",
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&pitch, sizeof(pitch));
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if (pitch == 1)
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pitch = 0x1000; /* for strange IBM display */
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address = 0;
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call_prom(getprop, 4, 1, dp, "address", &address, sizeof(address));
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if (address == 0) {
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/* look for an assigned address with a size of >= 1MB */
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naddrs = call_prom(getprop, 4, 1, dp, "assigned-addresses",
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addrs, sizeof(addrs));
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naddrs /= 20;
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for (i = 0; i < naddrs; ++i) {
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if (addrs[i][4] >= (1 << 20)) {
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address = addrs[i][2];
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/* use the BE aperture if possible */
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if (addrs[i][4] >= (16 << 20))
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address += (8 << 20);
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break;
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}
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}
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if (address == 0) {
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prom_print("Failed to get address\n");
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return 0;
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}
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}
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/* kludge for valkyrie */
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if (strcmp(name, "valkyrie") == 0)
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address += 0x1000;
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prom_printf("\n\n\n\naddress = %x\n", address);
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btext_setup_display(width, height, depth, pitch, address);
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#endif /* CONFIG_BOOTX_TEXT && CONFIG_PPC32 */
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return 1;
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}
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static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
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{
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return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
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@ -1479,7 +1423,6 @@ static void __init prom_check_displays(void)
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phandle node;
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ihandle ih;
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int i;
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int got_display = 0;
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static unsigned char default_colors[] = {
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0x00, 0x00, 0x00,
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@ -1546,8 +1489,6 @@ static void __init prom_check_displays(void)
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clut[2]) != 0)
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break;
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#endif /* CONFIG_LOGO_LINUX_CLUT224 */
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if (!got_display)
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got_display = setup_disp(node);
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}
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}
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@ -294,8 +294,6 @@ unsigned long __init early_init(unsigned long dt_ptr)
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{
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unsigned long offset = reloc_offset();
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reloc_got2(offset);
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/*
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* Identify the CPU type and fix up code sections
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* that depend on which cpu we have.
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@ -303,12 +301,6 @@ unsigned long __init early_init(unsigned long dt_ptr)
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identify_cpu(offset, 0);
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do_cpu_ftr_fixups(offset);
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#ifdef CONFIG_BOOTX_TEXT
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btext_prepare_BAT();
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#endif
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reloc_got2(-offset);
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return KERNELBASE + offset;
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}
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@ -578,13 +570,13 @@ void __init setup_arch(char **cmdline_p)
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/* so udelay does something sensible, assume <= 1000 bogomips */
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loops_per_jiffy = 500000000 / HZ;
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#ifdef CONFIG_BOOTX_TEXT
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map_boot_text();
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#endif
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unflatten_device_tree();
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finish_device_tree();
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#ifdef CONFIG_BOOTX_TEXT
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init_boot_display();
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#endif
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#ifdef CONFIG_PPC_MULTIPLATFORM
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/* This could be called "early setup arch", it must be done
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* now because xmon need it
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@ -188,13 +188,6 @@ void __init MMU_init(void)
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if (ppc_md.progress)
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ppc_md.progress("MMU:exit", 0x211);
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#ifdef CONFIG_BOOTX_TEXT
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/* By default, we are no longer mapped */
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boot_text_mapped = 0;
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/* Must be done last, or ppc_md.progress will die. */
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map_boot_text();
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#endif
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}
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/* This is only called until mem_init is done. */
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